We do need a safe layer for non-engineers to customize apps.
All these clones of Photoshop and similar tools are mostly dead ends, they are experiments to see if you can do it, but there will be a consolidation around regularly maintained and powerful and complete apps that likely also offer support.
These experiments are dead-ends for the most part long-term. Fun play things, but they will not gain significantly user bases.
Isn't this more of an argument to use common OSS choices? Like, encourage people to use Blender for 3d modelling; LibreOffice for documents; Gimp, Krita, or one of the many other art programs for ... art; OBS for simple video stuff; and so on and so forth?
> We do need a safe layer for non-engineers to customize apps.
Why? Every time someone cripples software in the name of safety it just gets replaced with more capable software that isn't.