The worst is not calls, it is the thousands of zombies hooked up on tiktok 24/7, of course with headphones, so completely unaware and indifferent to their environment, who block tunnels, escalators, turnstiles, etc.
In the 90s we read the paper and dumbed with our magnetic tickets. In the 00s we listened to MP3s while playing snake on an oyster. In the 10s we played Andy birds and listened to iTunes with a credit card at the turnstile. In the 20s we doom scroll and listen to Spotify while tapping out with our phone.
All of that that they did while they sit. I don’t remember people reading the newspapers while slow walking in the middle of a corridor. And the problem with headphones is that they make people unaware of their surrounding, alone in the world, and therefore for instance unaware that there is someone on their left that they will cut the way to. Small incivilities, but repeat several times a day every day and it gets seriously annoying.
Certainly people would do that. And sending text messages in the 00s. People have been wearing headphones while commuting for a generation, and (not on the underground but certainly on trains) people in the 80s and 90s were far more obnoxious - get stuck on a busy train between people having conversations about inane stuff while smoking.
Public transport is far better today than it was 30 years ago, annoyances are far less than they were.
The only benefit was the ability to jump on and off away from bus stops. If you had any kind of mobility issue they were awful, and even if you didn’t they were still far more camped than a modern bus.
I don’t see the issue.