Well let's assume you get paid 80k a year for your job, if you had two choices, either get a 1m raise now or hone your craft for one more year getting paid 80k and then get a 1m raise, which option would you choose?
Seriously though, that's a big difference in pay and while 80k a year is good money, it doesn't really set you up for the future the way 1m does in case your career ends abruptly. If I were an AHL player I wouldn't want to spend a day longer in that league than I have to - that is if the other option was NHL.