I think it boils down to this:
easyJet seems a very secure, relatively well run airline.
If you are currently concerned about your future and want to have security and a good rating, then the gamble may be on.
If you're not bothered about either of those, or are less concerned than that, I doubt you'd bother.
But....you only have a decision to make once you get offered a job and start date. It seems these jobs are for 12 months time, so what is not to like? Apply and see how you get on. Don't over analyse the situation is my advice.