...and there you get it. It's really about someone pining for the golden age, and habits that weren't as innocuous as he presents it.
Nowadays we have to live in the same space with millions of people, who all have different needs and habits. The kinds practicing rap on public transport are probably using one of the few spaces they feel safe to do so. It's annoying to you, but in your golden age half of them probably wouldn't grow into their current age, and the rest would be working in a factory. And just your hat-tipping-gentleman social position would mean that you can order them around. Unless you're unlucky enough to actually be one of them. Is this really something we want to present as more civilized? Because for me, the respect is obvious in that people can do a lot more than in your golden age (which was mostly more stinky and loud than in your icons).
We get quiet cars. We are able to acoustically isolate areas in libraries to an extent impossible. And at least Swiss quiet cars are actually quiet cars, so your headphones and typing is annoying others, and you will be reproached for it, so please use a notebook.
While settling down I talked a bit with my neighbors. And there's one thing I found out: I'm not the quiet one. We all were. Just at different times. When I shut down on the weekend, my upstairs neighbor likes to exercise. At time I like playing computer games, she does late work from home stuff. And your noisy teenagers may turn out to read books or code at home. No matter how impossible it seems to you that a woman with a cellphone might actually be a coder, or an artist.
Ah, and more and more railways are carrying quiet cars. So maybe portraying them as last vestiges of your vow-of-silence lifestyle is somewhat misguided.