Poulet,
Congratulations on your MA.
As someone who has a high degree of education they will not treat you any differently than someone who doesn't.
Please also take note that the passengers wont know any difference and will treat you with the same disgregard, disdain and vileness as a crew member with a PHD or no degree whatsoever - plus your seniors will not care if you're far too overqualified.
By all means go for it but it would be a shame to waste your education.