Pushups train calves more than incline flies.
Chin ups train chest more than lateral raises.
I thought this place was about movements?
Show me someone who has a bad chest that can do 1/2BW press and 20 pullups.
Go to the gym and see guys doing chest exercises 3 days a week and compare.
You can't, because thoracic extension and a strong back improves the chest too.
With all due respect, and I mean that, I think you're repeating a lot of marketing ideas about minimalism here. Don't get me wrong, the value of minimalism is huge: a big return on investment, especially for busy people. But let's not get carried away. Generally speaking, not so minimalist training (as ROP, S&S) will lead to far better results in absolute terms.
To your point, of course pushups train calves more than flies. But that doesn't mean either exercise trains calves effectively. They don't. This point can be extended to press/chins and chest, or, to put it in movement terms, horizontal pressing, which is really important and will make you a lot bigger and stronger than if you neglect it.
Re your point about 1/2 BW press and pullups, I could show you pictures of myself.
I got close to a half bodyweight press using ROP, and hit strict 23 pullups using fighter pullup program. Had I been training horizontal pressing, I would have been stronger and had a bigger chest. Using myself as an example, now that I'm training deficit pushups and dips, my chest and triceps has grown immensely compared to back then.
If we were to compare that to someone doing "chest" exercises three days a week, it depends what they're doing but they'll probably be stronger and bigger, such as if they're doing a powerlifting program or proper bodybuilding program.
The science on all this is really clear.