Personally, I'm fortunate that I've maintained a pretty strong connection with my 15yo daughter. A large part of that is that I'm comfortable communicating with her the same way her other friends do, not only the physical medium of the phone but also the cultural medium of memes and slang and pop culture. I can still play Authority Figure when I need to, but there's a lot less friction involved when I'm also part of her daily social context and not The Alien who requires a unique mode of communication.
If my relationship with my kid's is falling apart, I want to have some sort of signal that alerts me to it happening. I want it to feel awkward, so that I know to fix it. If the damage is masked behind a screen, I might miss it and never know to repair it.
* or whatever the new distracting device is in ~10 years.
my parents never told us we couldn't use our phones at dinner, but they did explain that when we did it, we were signaling that what we were doing with the phone was more interesting/important than family dinner. I decided that wasn't the message I wanted to give my parents, so I would only pull out the phone for time-sensitive communications. a little bit of respect can go a long way.
I think it's okay to set reasonable limits on screentime. I don't think you should force your child to interact with you; that seems kind of unhealthy.
I hate it but it happens with adults too all the time. Not only it's incredibly rude but I feel I'm missing a lot of meaningful communication
Unless his son is too young to have a phone he should be able to discuss ettiquette like no phone at the dinner table or while we are talking.