You're making a good point. I've noticed myself that the only moments I do real thinking nowadays are shower, bed (when trying to fall asleep) and the rare occasions when I don't feel like reading on public transport. Otherwise, there's always something else available that's easier and more comfortable than running with your own thoughts.
Was on bus yesterday for first time in close to decade, 65℅-70% of users where sat on their phones the entire way without ever looking up, it was actually quite fascinating to notice.