Larry Sanger once called me "butthurt" just before welcoming me to his e-mail "killfile". I forget the context completely, but to this day it stands as one of my proudest young Internet troll moments.
'Bread *and butter'. The English expression requires the second part—but otherwise fits perfectly in your well-stated point, with which I wholeheartedly agree.
TFA discusses at-length how APNs and FCM are necessary intermediaries regardless, effectively creating a technical duopoly on 'push'. We all agree it would've been preferable for things not to have gotten this way, but here we are.
In my own experience, no. Strictly cardio. The number of squats you'd have to do to constitue even five minutes of vigorous activity is practicably impossible.
Lifting weights could certainly count/classify as moderate activity though, just without as much 'bang for your buck' as dedicated aerobic exercise.
Calling it 'the gym' sort of conflates its two distinct sections: the one containing cardio equipment, and the other containing strength training/bodybuilding equipment. So-called 'work capacity' aside, there's almost zero overlap between the two sections.
Whether someone's effectively strength training/bodybuilding or not, which is the section I think you refer to—nobody reasonably believes that does anything significant for cardiovascular health, which is the topic being dicussed here.