Before my first ever cover band concert (which I found by accident), I thought the exact same thing - why any musician would be in or start a cover band, I'd rather go to the original band's concert, etc. then I became obsessed with a no-longer existing band but still wanted to go to parties, clubs, pubs, etc. where I can have fun to their songs. So, I gave it a try, went to one of the shows and enjoyed it so much that I went to the next one too and the list goes on. If you're in the same boat as me, I mean, can't afford the original band's ticket or they don't even come near to you but still want to hear their songs live, a cover band is your only choice. You just have to find the better ones (quality not quantity - thank God in my country there are a few of literally almost every bigger bands). And don't forget - these bands are celebrating and keep spreading their favourite musicians, idols with this and I think it's great (that's how one of my friends got into the Beatles).