Don't listen to them! Cabin crew are, first and foremost, required only for safety reasons. Any other duties you are involved in whilst fulfilling your function as cabin crew are secondary. Depending on which airline you end up with, these duties will include food and drinks services and/or tax/duty free goods services, which are designed primarily to earn the Company (and you)some extra profit. After that comes passenger welfare, and this will include being able to cope with medical emergencies, potentially dangerous confrontational situations, badly beahaved kids and even more badly behaved 'grown-ups', as they like to call themselves!
It is a responsible and demanding job for which you will have to give up any notion of your (probable) previous 9-5, Mon-Fri lifestyle.
If this is not enough to put you off, then you can be sure to eventually enjoy
an enormously rewarding job and a great sense of 'belonging' to the great aviation fraternity.
Well worth giving it a shot and good luck!
Rachman