My buddy has season Jazz tickets, says everybody in Utah knew that was just an excuse for Fisher to get out of his contract.
And I actually heard Fisher's daughter was getting treatment in NYC, not LA.

You can just google something with key words like "Fisher daughter excuse", and see various articles and threads debating the situation. Some defend him, some accuse him.
I think the main parts people argue are:
1. Fisher was traded to the Jazz, he never wanted to play there. It's not like he chose to play there signing as a free agent.
2. Fisher's daughter got her main treatments in NYC, not LA.
3. Utah has some of the top doctors in the country for this treatment.
I don't know if any of these are actually facts, but it's the main points I see brought up.