I have a couple of hundred hours in various light single, mainly PA28s of various sorts.
Although the abstract debate about power/attitude is valid, in practice in such a simple, lightweight aircraft like the PA28 it is the use of both power and attitude in harmony that seems to deliver the best results for me.
I always thought that the way this subject was taught on the CAA syllabus was not very intuitive.
As on other poster said, it is an issue of parameters, so why present power/attitude as working in isolation, when in reality they do not?