What's wrong with this? They have resources and desire to make their work fun. What happened to wanting to enjoy what you're doing?
And I guess the other "wrong with it" is the fact that it just wastes human potential. Build robust software and take pride in this, not it naming your servers bob and lola.
I don't share my kids excitement about most things, but I'm genuinely happy they enjoy themselves so much. Being able to use the same notion to all people, not just (your) kids is part of growing up in my books.
Knowing when the fun needs to stop is a way to create valuable things in society. I prefer that, compared to living in world where the state of software is so dire because developers are overgrown kids that spend time writing blog posts about how they named their server pikachu because "pikachu is soooooo cute!!!1111"