Got asked similar more than 10 years on a business extension. Nothing new. Was under a Taksin government so Taksin had probably made visas to troll then as well causing a crackdown.
Its meant to be there and can be asked anytime. Very few reports of being asked though.
The rules can change or be enforced anytime. Dont be surprised if it starts getting asked soon especially after the election.
A wise move is to keep it there and attend courses.
Remember bank accounts were closed and immigration dont want anything to do with it. 10,000 education visas where cancelled a few months back. There almost certainly will be a crackdown on it.