I actually wouldn't be opposed to teaching sign language in schools to hearing kids.
So, personal story time but I went to a meetup group (basically just "people in local area" thing) and there were a few of us there talking and such. Then a completely deaf guy shows up. Obviously none of us can sign, but the guy communicates using his phone (opening up a texting app and typing out the words). This was hella slow and awkward. The rest of us were talking at a mile a minute but feeling awkward for sort of excluding the deaf guy from our conversation. So we would awkwardly slowly type things on the phone and basically be having a completely different conversation with him - a very slow and superficial conversation ("What are your favorite foods?" "Oh, that's fun. I also like tacos.").
I don't know what a good solution to this would be. Part of me thinks that he should just stick with other deaf people, but that's kind of rude. There should be ways for deaf people to interact with the rest of society. Getting cochlear implants would be a great start, but the Deaf community seems to REEEE at this. I'm not saying implants are perfect because they obviously have a lot of flaws, but they're a start! The other solution would be teaching ASL in schools as a mandatory thing. Even then, though, can I remember most of the French I learned in high school? Not really. I retained some of it, but without using it, it's going to fade from memory.