^^ Still a loss though whatever angle you look at it, what he will be getting in Celtics is way below what the Lakers has offered to him, which he gladly turn down. Of course, he has one year to proved it in Boston, but I doubt that they are going to offer him the same as what he is looking before. Yeah, maybe $10 million based on his performance, or worst they will drop him if perform way below expectations again.
Dropping it won't be fair anymore. He is athletic, he can score and he can defend well. Veteran contract is 2-2.5M and he is far from old.

Even if he injure himself this year, he might still get a good contract. It's the timing of trade that he should learn or his agent need to learn.
This could be the reason why he only want 1 year contract. He will just use this time to make a name again.
Last year was full of inconsistencies and then he goes back and forth at health and safety protocol because he was trying to avoid being vaccinated.
If he will contribute to put Celtics back in 2nd round or better ECF, it will be a good pay day next year.
