Because it sounded an awfully lot like you were trying to rationalize not putting the failures on your application.
Check ride failures is what they are looking for. A stage check in an approved training program is not an FAA failure.
If everyone had to do that, anyone with military flight school would have to put every ride failure through training. Then no one would get hired.
FAA checks, yes, stage checks in a school, don't worry about it. But as stated above, don't even try to lie or omit stuff. If you are caught, it's game over, and never another interview. They really don't like dishonesty--and I have to agree.
If it's FAA, put it down, let the process decide.