For literally all Flight Schools you'll be put through Pilot Aptitude tests (numerous of them),
That's not true, sure OAA does and FTE and no doubt one or two others. But most don't. One FTO introduced a test. I asked the one of the senior Instructors why. He said it was because a competitor had one and it gave the impression to the potential student that he or she has passed something difficult and thus reassured them they had the 'right stuff'. Plus, more cynically, it was yet another revenue stream.
Like it or not aptitude tests prove you're good at aptitude tests. School exams are to get you into university and lack of them doesn't stop anyone from becoming a pilot or indeed a millionaire.