I'll do this in Q&A format to keep things simple:
Q: What is the general purpose of deaf communities and deaf culture?
A: To recognize and meet the needs of hearing-impaired people, and give them a voice of their own as well as belonging/acceptance somewhere.
Q: Why are they both important?
A: Because they're a way of fully establishing identity and a feeling of security in the world, whereas many deaf people wouldn't be able to otherwise.
Q: What helps establish identity?
A: Communication. The ability to express oneself and get adequate feedback. The greater the number, the better.
Hearing people in hearing society may hear 500,000 words/day from 250 different people. People who exchange values, beliefs, constructive criticism, etc. From this, it's easier to become socially adept under most circumstances.
But deaf people in non-signing (or signing) hearing society, on the other hand, may only get up to 20,000 words or less/day by reading or lipreading or being around hearing people "willing" to communicate with them.
Hearing people may not give honest or full disclosure of their thoughts, and may give a watered down explanation because sign language is tedious to them. This greatly limits a deaf person's ability to grow and establish identity. Disclaimer: not all hearing people are like this, but most are (from my own experience).
Yet that was only for a single day. Think of how much information and constructive criticism hearing people get in a YEAR compared to deaf people. I made up a quote a while back to illustrate this point to some hearing people: As telepathy (reading each other's minds) is to a hearing person, so is the sense of hearing to a deaf person... in the amount of information you would receive... and the capacity for personal growth that could be gathered from each...
Yet how the information is processed is relative to each person, and some learn while others never learn. Deaf people have different experiences than hearing people, and can learn to process information in a way that could keep up with them.
All this is why the need for deaf communities and deaf culture. They provide deaf people with the basic human need of companionship, including psychological and personal growth and empowerment, as well as higher information exchange. Deaf people very likely won't get all this otherwise.
Deaf culture is a combination of beliefs, customs, practices, and social behavior. Those patterns can be picked up later on in life by anyone (including hearing people) through cultural immersion - and it's about understanding deaf people's needs and sharing the same values. Even if one may not be 100% fluent in ASL, I believe it's still possible to be culturally Deaf by regarding their values as your own and being around deaf people very regularly.
Sorry this got too long. Just wanted to point out a number of things.
Endymion, your question is a hard one to answer but I understand what you're saying. Ruth Bendict's take is useful for negotiating purposes. The majority of people out there are not aware of the "
ethnocentricity trap", so they hold on to their cultural bias. It is our job to make them (both hearing and deaf) aware of how ONE culture affects how they view the world around them. Strip away their ignorance. Only then can we make them more receptive towards accepting that the needs and beliefs of a certain culture might be different from theirs. And more willing to accommodate to meet those needs.
Even though American culture exhibits characteristics that can be paralleled between hearing culture and Deaf culture, the need for communication is reason enough for a deaf community as an impairment of it is also an impairment to personal growth and all the things I listed earlier. Also,
Maslow's hierachy of human needs is reason enough for Deaf culture to exist. Some needs are unfulfilled in hearing culture. Look at the pyramid, especially at self-actualization. It lists "lack of prejudice" as part of a basic human need and this need is a huge issue for Deaf culture.
I would think deaf people in general have more cultural experience because we seem more accepting and receptive towards differences because we know what it's like being different. Also, 90% of deaf children come from hearing parents. They get a taste of the hearing world. But experiences vary from deaf to deaf, some have have much more experience in the hearing world than the deaf world, and vice-versa. What's important is learning how to have an anti-ethnocentric view about the world around you. And understanding that truth is relative.
Our greatest tool may be to educate others using our shared knowledge.
I agree that pluralism is a beautiful thing, ismi, and WOW at your own experiences, sr171soars. I understand how it feels being trapped between worlds and it's a horrible feeling, but the world is a much better place now for deaf people than it used to be.