I treasure my memories of being on subways and busses and getting lost in thought while staring out the windows, yeah. I mean, people have done this for basically all of human history (okay walking or something, not on a train, but, yeah). It's not a bad thing to have some time with just your senses existing in the world.
I mean, you're right. When I travel, I rarely use my phone or listen to music because everything is about discovering new things, and I love it
But when I'm home, on my way from home to the gym, I take the same route every day, and it can get boring sometimes
I'm also terrible at keeping my phone charged, so sometimes I end up alone with my thoughts anyway