whatsoever under B1/B2 status. Does this not create a catch 22 situation for part-time courses/students?
It creates a massive can of worms. For example I may go to the USA to do a company training course, software / equipment supplier training course - something previously allowed under a B1 visa. However, if NO training can be undertaken under B1 or B2 then I'd require an M1 for each and every instance (as opposed to a 10 year multi entry B1/B2)!