I always hated the idea of traditional family dinners, it's the idea that consumption = socialization and they just get so boring. A lot of people see them preparing kids for a lifetime of weddings, bars, and dinner dates as a positive which is weird. I think the copious consumption is the natural evolution of that.
Trad wives especially get pissed at me for that opinion but a lot of the have no skills, or talents and just force their kids to spend an hour a day with them without their electronics or work. If parents spent that time with their kids exploring different hobbies and skills (art, sports, music, exploring nature and so on), we wouldn't have that problem.
I agree that often the "family dinner" can seem like a drag and in truth it has led to things like "the clean plate club" or "no dessert til you finish your dinner" which has had a small part of the rampant obesity we see in the U.S.
But akchually, sharing a family meal serves a much greater purpose than consumption and has a large place in the evolution of human society.
Let's go back just a few thousand years and get a quick glimpse into the history of meal sharing. The males of the family group would hunt and (hopefully) bring back meat to the family. The actual hunters would be rewarded with the choicest and largest share of the hunt. That made sense, since they need the additional caloric intake to supply them with the health, strength and energy needed to continue to supply the family group with sustenance.
Then the divving up of the rest of the meat would begin. Who was pregnant and needed additional nutrition? Who prepared and supplemented the meals with foraged food? Who was old and infirm and unable to contribute to the meals? Who was just a worthless leech and wanted more than their share? Disagreements would be discussed.
Gathering for meals was a time when all members of the group were assessed, deals were made, health or illness was determined, plans for future meals, all manner of things relating to the survival of the group was determined.
Here, back in the present time, shared meal time does or should serve much the same purpose. The most important thing about shared meals is COMMUNICATION. Verbal and non-verbal communication. Is Dad stressed? Is little brother unusually quiet? Not to mention learning simple etiquette making tribe cohesion much more peaceful.
So yep...I'm one of those who believes that something as simple as a shared meal can go a long way to making humans a little more pleasant and able to manage when they are out in the larger world.
ETA: Totally agree with you about the importance of sharing other time in things like hobbies, sports, etc. But barring that, family meals is the bare minimum that should be done teach and learn to be human.
Edit2:
@ShortBusDriver just said in a few words what I just sperged on and on about...