Is it normal to think "gender reveal parties" are dumb?
It's just unnecessary. What makes a gender reveal party unnecessary is:
1) It just costs more money to do
2) Parents can reveal their kid's gender at the baby shower
and
3) They're already getting gifts from the baby shower
These parents just want more attention to be all on them as well as pandering. They should be grateful for what they get.
I don't understand why they would have more than one baby shower after they have their 1st child either. The whole point of a babyshower is to signify the couple's new future as parents. To do it multiple times for every kid they have is excessive.