I mean, if there's value to them, they're correct, it doesn't impact you. If their 'impact' of you is making the parties more expensive to a level you don't want to spend, then you don't see the value in the party that they do, so let them spend and you avoid doing so.
Do I think they're worth it? Christmas, yes, but Halloween, no. But I'm also a Christmas guy and love the fireworks, parade, and all. At their top price, though? Neither is worth that much. But as long as people keep paying, Disney will keep pushing until they find a break even point where higher prices don't lead to sell outs, which leaves them with less revenue. And it's really not even about selling out for Disney, at the higher prices, they can not sell out every party and make more money than they did in the past because it's sold enough tickets compared to the previous years with their pricing. And that may even make guests who attend more satisfied because there are less people, creating an easier environment to do all that the party offers.
All this to say, if someone finds value in it, hats off to them. They aren't for everyone.