I probably would, but I wouldn't sever a binding contract in order to do it. I'd wait until that contract came up.
Fisher took advantage of his daughter's condition and the Jazz's good will in order to circumvent the CBA, then joined a conference rival because it was better for his career. It would be like if I was a high-level executive with Microsoft, begged out of my contract making some bereavement argument, and then a month later took a major position with Apple.
It wasn't "better for his career."
He took less money and went to a team in turmoil. I don't see how that is "bettering" your career. It so happens that his presence helped smooth the turmoil and the team FAR exceeded expectations.
The Jazz were in the WCF last year. The Lakers bounced first round, and their star was bitching ALL SUMMER...starting with his post-playoff press conference.
Fish wasn't walking into a fairytale...in fact, he took a huge "career risk" for less money on a team in turmoil that didn't get as far as his former team did.
To spin it otherwise betrays your bias.