I agree with you totally in my own personal point of view... 1% share is quite a big slice!
And I know you're referring to Haejin.

His content seems to be low-effort posts to me too and it's clear that he's maximizing his rewards by posting countless times a day... with each post accounting for more than 300$

But I have never seen anyone other than him getting that much rewards.
Not even 0.5% .
I saw a guy here a week ago who had created a fictional story of Elon Musk I think... it had a pending payout of 1100$ . I did a quick glance of the post and it was a quite long, well formatted and nicely written blog post. He had put a lot of effort on it and I would say he deserved it...

If he were to post 1 post each day, each accumulating an average of about 1500$, who are we to put a cap on his rewards?
I make very little on my posts so I too feel uneasy when a single user takes a large share of rewards but I think if the content creators haven't abused the system in any way, then they deserve all the value their content receives from the community! Afterall it's the community itself who tipped the content.

I attended a meeting today in Mspwaves radio and witnesses were having a discussion about the same thing. Maybe they would have loved this idea.
But I'm more of a freedom lover you know. I think decentralized platforms will lose their value if we add strict rules like the centralized systems.