Why meeting the band is so important???

Ok... i get they are interesting and stuff... of course some of them are gorgeous... BUT.... why if you go to a concert, why do people stress about meeting the band??? Yeah some people would say, it's cool to meet who you admire, i totally get that... i'm not saying is a bad thing, to me it only gets bad when meeting the band is more important than actually enjoying their show.... I've seen people focus completely on following the band after a show until they get a picture or an autograph..

To me there is no better memory than the music they just played... most of the bands i go see, give their best onstage... so why follow them after if you just got what you came for... THEIR MUSIC RIGHT???

just something i've been thinking about....