I see no reason why a curator shouldn't have a high UA score. Especially if UA could have an impact on voting weight in future. In my recent article I mentioned the example formula:

vote_worth = UA(voter) / UA(average) • SP • vote_strength.

If a high UA score strengthened the voting value of a curator (who may upvote your articles), then of course it could be worth to follow him.

No one will stop following someone that they have on their list because they think their UA score is too high.

I will. And I did already. I unfollowed inactive accounts as well as accounts which make much money with less effort in my opinion.