and of course there are those pilots who will never be able to perform aeros as the act of doing them incapicates them!!
Not everyone is blessed with being resistant to motion sickness. I know of many oustanding pilots who can't fly aeros for this reason but are perfectly in control of the aircraft.
I would suggest being totally proficient at the basic recovery skills is far better than believing everyone should fly aeros is the answer.
Aeros are not everyones cup of tea, same as the guy who insists on towing his house behind him on a bloody diesal escort and the guy who drives the 350HP nutty car dont understand each other but they are competant drivers.