I’m not saying it’s fundamental, sorry, I should have specified. You’re exactly right, GNOME is driven by it’s Foundation and so there is leadership in place to make sure that the software ends up as a cohesive whole. Software projects that don’t, or that create one after the fact, tend to be a lot less so.
If you’re going to be an asshole about it, pick something other than Blender. That is one of the best examples of how organizations produce cohesive software that adheres to design standards with the express purpose of making it user friendly. User friendly is not the same as easy. It means ‘respect the user’, not ‘fisher price’.
You’re espousing the exact attitude that drives people away from contributing to FOSS software to solve problems so please crawl into a deep hole and spam neofetch on your Arch Thinkpad, cretin.