That quote makes no sense. Load on the muscle is there with both bodyweight and weighted exercises - that's how you train the muscles. And the caveat about not

That quote makes no sense. Load on the muscle is there with both bodyweight and weighted exercises - that's how you train the muscles. And the caveat about not skipping progressions works just as well for weighted exercises - you progress gradually so you never produce "strain on the muscles that they may or may not be able to deal with".