Not to be alarmist or anything, but WE ARE ALL DOOMED THIS IS THE DOWNFALL OF SOCIETY EVERYTHING IS RUINED FOREVER.
Look, there's a great deal to be said for basic politeness. And there's a little bit of charm in the idea of everyone at these meetups hitting all these buttons at each other and sending all these ridiculous rote messages, the exact same impersonal, low-effort, lazy ones each time. It's the equivalent of two people meeting in My Fair Lady and mechanically repeating "How do you do?" to each other: Well-meant, and kinda funny to watch, but a little stiff, and ultimately entirely empty. It's a mockery of an actual exchange of meaningless pleasantries.
Mostly what chafes me is the idea that this button-pressing is mimicking something meaningful — actual expressions of goodwill — and it's supposed to be taken on the same level. In the same way "lol" is now a punctuation mark meaning "this thought is complete," and "Like" can mean "I saw this" or "I would like to win a prize from your company," "Nice to see you" in this context means "I have enough positive feeling for you as a person that I'm willing to click on a thing." It's actually grosser to me than exchanging no post-meeting words whatsoever.
So it was lousy to see all of you, so there. Where's my button for that?
I'm-a feelin': irked