I too do understand what you mean. Just make , if it's important to you - mental numbers how often one bumps into you during daily normal life and how often that does not happen. When street life gets normal again.
I think, what you may refer to is that people tend to be thinking a lot, while moving through public. That makes them into creatures which carry their brain to the next destination, very self absorbed. Happened quite a lot to me, too :) Under normal circumstances it's not such a big deal. And when I am mentally stable and relaxed.
Have a good day:)