About: "more holistic human interactions especially over meals".
This my own personal opinion and I am not offering any advice or passing judgement:
"If you feel like checking out HN's over lunch more compelling than talking to your colleagues... it's because you find your colleagues not very interesting to interact with".
Shunning social interaction in such circumstances is rude and not a desiderable trait, but the desire to do so means just that: you are not very interested in the people you go around with.
Ask yourself why it is so, and try adressing that problem instead.
That's a well and truly awful generalization. It's perfectly alright to be in someone's presence without direct interaction. You can read a book or watch tv with a loved one, for instance. That doesn't in any way mean you don't find said loved one 'interesting'. There is more to 'loneliness' and its antithesis than talking to someone.
Saying not talking to a coworker over lunch is rude seems harsh and rude.
Maybe you misunderstood me or I misunderstood the OP. Or both (in my defense, I was writing on my cellphone on a bus, maybe I will be more articulate now).
What I understood from the OP was something like "people who share lunch and instead of interacting prefer to constantly check their phones for FB, news, interesting links and so on".
If this is the subject, then my take is: doing this "in presence of others is rude". It is much better to sit together with others even without speaking, or not adding much to the conversation in any case.
Sitting alone to read stuff over your smartphone while eating (also: substitute paper book if you prefer) is not the most socially inviting move but it is way better than sitting together with someone else and ignoring them.
Assuming we agree on what I wrote above, I will not go back to my original point: if when you are together with others you feel like you would prefer be alone and checking out something on Wikipedia (or try to find excuses to somehow glimpse at you FB feed) it could just be a symptom of not really being interested in Frank's son antics at the kindergarten or Jane's rant about the current POTUS or the last football's match.
If this happens also with relatives, this is perfectly normal, too: you have probably just different interests (compounded by the fact that if you have known each other for decades there is a high risk of getting mostly rehashes of stuff you know already).
What I am trying to get across is: "if you spend time with people that you consider genuinely interesting, I am pretty sure that the smartphone will stay in your pocket (unless if someone wants to check something on wikipedia or whatever)".
Note also that (to more specifically address what you wrote) it is perfectly ok to share a meal with little to no interaction (apart from "please pass the salt" or whatever). It is in fact a proof that you are perfectly comfortable as a couple or a group, but again, this is different from one or more participants focusing on their own small screens as if they were completely alone at the table.
