I am going to take a crack at explaining it (if I am wrong I beg forgiveness in advance)
What you are saying is whether or not you have the physical ability, not necessarily the ability to hear, and to make movements and sounds for speech. Doesn't mean you don't mentally understand the basics of the language itself. Therefore making a person able to be fluent in the language they are learning.
Yes Julie! Where we disagree is that some of us define "oral skills" as that ability to form words, the mechanics of speech production, pronunciation, using all those speech organs, knowing how to bring together tongue, cheeks, lips, lungs, glottis and all that goes into producing words.
And we think that language development (whether the mode is spoken or written or signed) is the comprehension of how words are used together to communicate concepts, including grammar, syntax, semantics, phonetics, phonology, everything about how the mind codes ideas into something transferrable to another person.
It's not just that we're using the different interchangeable words to define the same concept that's at issue, it's that a critical point involves separating out the mechanics of producing speech and words from the development of, and a focus on, language. One of the big criticisms of "oral learning" that I've heard from the deaf is the focus on refining incomprehensible sounds (boo, bah, bee is often tossed around) when what a child needs early on is a way to communicate. This doesn't have to be the way a child acquires a spoken language.
English and ASL can both be taught to very young children, while fully developing manual skills and oral skills (those skills we can employ to deliver language) occurs organically during the language development or with aid at a later time. For deaf without access to speech, historically oral skills were the focus. For a hearing child or one with access to sounds via CI or HAs, picking up oral skills can be incidental and language can be the focus from the start.