Why are very good players so "unlucky" ?

You put labels of good and bad, but I don't know if it's really true, however, it's not about luck or bad luck, it's just about your own action

Good players get lots of their chips in the pot with a very high win percentage a lot more than bad players do. This will put themselves in a position to take a bad beat much more often than a bad player. So they will seem that they get more unlucky but of course it is just an illusion.

I disagree. I think that if you play a big volume of hands, it's obvious that some times you will lose against hands that have 4-8% of chances to win. If you play a hundred times a hand 96% against 4%, the worst hand will win 4 times approximately.
I think that the real problem is that we just remember the bad beats and we don't remember the winning hands, also we don't remember when we win a hand being the weakest one.