I dont think ownership is the main problem. The larger problem seems to be global. The ability to be expressive comes with it certain biological traits and dispositions. These traits may determine your viewpoints on matters. So, if I hire journalists purely based on their writing ability, I may find most of them have very similar political views. If I create an industry of the best actors/musicians, again I may find…
"The ability to be expressive comes with it certain biological traits and dispositions. These traits may determine your viewpoints on matters." This is an extremely hand-wavy assumption that you're basing your arguments on. Any evidence to back that up? It would seem to me that the ability to express one's views would be orthogonal to one's viewpoints on various matters.
Since when? I know quite a number of brilliant engineers in different fields. Most of them should never be put in front of a camera or a general audience for public speaking. Having strong and even well understood viewpoints does not mean you have the ability to translate them outside of your domain well. That is a rather rare trait.