Is it the case that the tower atcos are doing more, shorter shifts per month? Consequently getting fewer days off. Is it also the case that the tower roster is less predictable and that tower atcos are not able to plan their time off until they actually receive the revised roster on the third(ish) of the month?
With these things in mind, is the tower atco really doing any better? If the rosters were swapped would you still be complaining about the drawbacks?
As others have said - it all balances out!