That is your typical response to say it is based on "empirical data" that you are never able to cite or produce. No matter how many times you say it, still does not make it so. Cite your proof that the oral only approach limits a person from reaching their full potential and BTW add in your "proof" for this additional subjective opinion that you are so fond of tossing around:
"Oral only environments create problems that an individual must spend a lifetime remediating."
As for your unsubstantiated opinions, that you like to mask as facts, not going to argue with them but if that is what you believe is the basis for why parents choose ultimately an oral only approach then you are mistaken.
BTW for the deaf child of hearing parents who does not have oral skills where does an "environment that permits 100% access to communication" exist? Once they leave the house, is it in their neighborhood? With there extended family? Is it in their local schools? Does it exists in their community? Will they find it in the hundreds of daily encounters they will be confronted with? In their workplace?
Again, while you insist on a one size fits all philosophy for deaf children, that not surprisingly, is based on how you ultimately raised your deaf child, I prefer to maintain that there is no one way to raise any child, even a deaf one. Each child is unique, so is each family situation and what works best for my child is not necessarily the best approach for your child.