If someone doesn't enjoy Maths and/or Physics, are they going to enjoy ATPL studies? I suspect not. Are they going to be any good at ATPL studies? Unlikely.
Afraid I can't agree with you there. You are ignoring factors such as motivation. Doing Maths and Physics at school where the teaching does not appear to have any relevance can be very dispiriting.
However if you have an overwhelming desire to be a pilot then ATPL groundschool should be "interesting" plus you should have a definite motivation to do well.
I think laakdown illustrates this point well.