A large part of it is that commercial use involves sharing files with other people. It's very hard to get constant results if you are not using the same softwar

A large part of it is that commercial use involves sharing files with other people. It's very hard to get constant results if you are not using the same software. The file formats are mostly propriety and complex. The effects applied are dynamic and probably also propriety. It's just a mess, so everyone just puts up with it and continues to use "the standard" software. If you are just doing graphic work yourself, there are other applications like Affinity that can work, as long as you are not collaborating.