I don't get the hate either. Sure, some people really overdo it and it ends up looking crappy. But I don't mind some subtle lighting for the rig that I paid some serious money for.
And @Bananasplit_00 I don't really think that the "RGB tax" is as noticeable as you make it out to be. The components themselves are so expencive, a few bucks more for lights that you may or may not use don't really end up making a difference. Besides, there usually are a lot of RGB-free alternatives, so just get them instead.
It all ends up comming down to personal preference I think, but why some people can get so worked up about it I don't understand either. But that's the internet for you I guess