Katy Perry's music, which I find to be amongst the absolute worst of modern popular music, is not the issue here. As completely contrived as the lyrics and melodies are in this style of pop dance music (reaching their nadir in Rebecca Black's "Friday"), the current Internet kurfuffle is about her tour rider.
And honestly it doesn't seem like a very big deal. The rules that the driver has to not talk to the passengers, and not be security, seem... well... reasonable. There's an effort to make them seem "diva-esque" but as the rider repeatedly states, the reasons are for safety.
Sure, she wants some stuff in her dressing room. But for the sheer size this tour is (apparently the tour is a good 50 people minimum, it may be more) it's a fairly small effort on the promoter's part compared to all the things they likely have to do with the load-in and other logistics.