Could be just me but I think a lot of older generations share this experience. It is not hard to take out your earbuds or take off your VR device to show you are paying attention to the person you are talking to.
I am only 32 and wouldn't consider myself old.
I used to get very uncomfortable, maybe even angry, when people at the cashier in the supermarket just did not get off their headphones and just leave a simple hello to the person at the counter. Nowadays I am just mildly irritated sometimes, but I still think it's stupid. Especially if the cashier is a really nice and polite person. Leaving on your headphones and not saying a word, sometimes not even giving them a look, feels like a f- you in their face. Just be nice to other people and it even works if you are a very socially awkward person like me. The world can be nice and even give you a smile every once in a while.
This obviously got worse since corona. Germany used to be a cash-heavy country, but now since "everyone" is just paying by card, they just pull it out, wave around with it to signal that they want to pay with it, so that they don't even have to say one single word. So weird.