I could not care less what you think .I can tell you it IS fact some cabin crew that i have met over the years have worked as Doctors,Lawyers,and Dentists prior to joining BA. Why they have chosen the BA path i don't know.
I could make a couple of suggestions:
(a) They weren't very good.
(b) They're lying.
Of course, option (b) would seem the most likely, given the amount of lies we've read over the last year. Perhaps in reality they were assistants to the aforementioned professionals, but chose to embellish.