Is there any hope for these incompetent design churners to realize that users can do better and give us some power? Like, why can't I simply tweak a few things

Is there any hope for these incompetent design churners to realize that users can do better and give us some power? Like, why can't I simply tweak a few things in a visual designer and have that as my toolbar design in all toolbars written with the standard Apple GUI framework? (or find a mod written by someone other better designer?) Then any OS upgrade would simply be an extra theme suggested by the OS that I can safely ignore and continue to use my own without breaking my workflow?