Shouldn't

Shouldn't or should not. Shouldn't can be moderate or immoderate. An immodarate 
shouldn't is someone suggesting their kid not be an artist cause he should make money.
A shouldn't can be a form of gatekeeping or overlap with the concept of gatekeeping."This is the game the devs wanted to make," tell this to everyone who ever made a mod. Tell them to go back, and destroy the mod because it's something different than what the devs did.
Or actually, what you're doing is, or overlaps with gatekeeping (https://www.reddit.com/r/gatekeeping/). You're inventing up reasons for why new things shouldn't be done, or why some person shouldn't participate in something, such as working on an idea. It's common and it's not good human behavior.