I considered teaching also, but decided I wouldn't be able to cope with kids and their attitudes.
Little did I know about RM managers and theirs!
I wouldn't recommend RM as a career choice.
Not unless you have the drive to go into management and climb as far as you can.
This would also require a lack of a conscience.
RM will be here in 20 or 30 years, in my view.
It just won't be in the same state or format that it is now. But then, what will be?
Personally, I'd go for a managerial job in a supermarket.
It seems to be the only sector that relentlessly expands, and should therefore be relatively safe, for job security purposes.