I later suggested ways to make the hurdles for voting higher, which would fix the problems you mentioned. Required account age, maybe even how much content you need to have watched. Honestly, we could just filter out the people that only do 1/5 star votes. (With niche content of course there would be the issue of having no/just a few votes but voting would not be the only metric anyway.
I am very heretical towards common held UX believes and think trying to design for the lowest common denominator just results in all around awful experiences for everyone. We should rather strive to empower users.