Buddy Hield had the 2nd highest usage rate for the Kings at 27.2, just behind De'Aaron Fox.

He had the same usage rate as Kemba did for the Celtics. Here are the Celtics for comparison.

I don't like usage rate as a statistic. I don't think it adds anything to conversation over a player's regular stat-lines.
Also, some folks have been talking about "offensive load" statistic over at thinking basketball which is far more accurate and reflective of a player's role than usage rate. But you have to pay to get those for all players.
https://backpicks.com/2017/10/16/offensive-load-and-adjusted-tov/For a player like Buddy I'd view FGAs relative to minutes (since he is a scorer). He gives you some ball-handling and secondary playmaking but not enough that it is going to make any drastic changes to your offense (and his overall usage).
In other words, he is a guy that is going to need to take large number of shots and that is a good thing because he is one of the best shooters in the league. You are happy that he is taking those shots. That is what makes him good and what makes your team's offense good.
Buddy would slot into the offense behind Tatum and Kemba and probably ahead of Jaylen in terms of usage.