because the 45hr-min PPL syllabus is far too short to teach someone all this stuff,
but that's just a MINIMUM.... no one says you can't, or should, do more. It's up to the instructors and schools to advise doing more... the minimum of 45 ist quite enough... anymore will just scare potential students from getting into flying to begin with. Once they get the flying bug, they often don't care how many more hours they need until getting that piece of paper....
my opinion..
Westy