My grandad taught me a slogan years ago, he said " if you are in that much of a hurry then you should have left earlier!" I have noticed on my daily commutes that people seem to find out exactly how uch time it takes them to get somewhere, and then leave absolutely no time for anything else. Remember the cliche " life is a journey not a destination"? Most people forget that. They get stuck in the ritual mundaneness of daily life that to think of stopping for a mere moment to enjoy, or appreciate, or even notice something outside their own space is almost impossible.
As to enjoying the music and the muscian playing it, hmmm perhaps buskers have become just as common as our daily routines that the act of ignoring them is as much so. Maybe many people see street performers as people unwilling to get "real jobs" and feel that supporting them in any way only maintains them and whatever negative habits some might feel fit to assume they have. Then again maybe people just don not care about beautiful things anymore, or only when appreciating that beauty is convenient. Who knows?