Some artists are VERY touchy about their work being used in ways they didn't formally agree upon. If you dig deep enough into the online art commission rabbit hole you'll find artists making all kinds of excessive demands in their "terms of service" about what you can use it for, what edits are allowed etc.; I don't doubt for a second that someone's seen a goofy visual effect being used on one of their models and thrown a shitfit about it.This is retarded why remove a completely optional feature?
Obviously none of these "rules" are enforceable, but these fuckers are loud and obnoxious enough that no-one can be arsed to argue with them.