But I've never really understood why MK is uncool whereas (for example) Bruce Springsteen, is not.
Not same interact between the Artist and the audience.
Example : don't try to request Mark to play a song - he won't.
Bruce is to the opposite and turned the request to a game. People come with a placard and throw them on stage. Then Bruce collect them and has the challenge to play them.
Anothe example is Mark has become almost unreachable off stage, especially when arriving to the artist entrance. If more than 3 people he won't show. That seem not very cool.
But Mark has alos his cool side like when he did the pre show that some happy few fan could attend, shake some hand form the audience at the end of some shows, allow fan recording the show, allow seated fan to stand up and come front of stage for the last part of the show...