But I fully agree, most witnesses are the same amateurs as we users are. Them having a big stake is no argument, its a fallacy/a bias and as we see in Steem it leads to HFs which are maybe not the best decision.

There are many things that should/ could be modified.
However, there are fundamentals that should not be even touched.
Cars must have 4 wheels, not 5, not 11. Four wheels.
And if you want to hire someone to be on a well paid position - you shoul make an open call, make some selection and chose those who fulfill the criteria.
Simple as that