Earlier quoted context omitted.
"Lift a heavy stone"? That's a joke, right? Barbells and dumbbells are appropriately ergonomic (handles, balance, etc.) and won't ruin your back if you use proper technique. Lifting a heavy stone is a recipe for injuring yourself severely . People need specific indoor gym equipment if they lift, which is a very valid form of exercise. Or, you know, if it's raining or thunderstorming or a humid 100°F outside. And body…
You can't just dismiss the fitness routines people have spent years choosing and refining and getting better at. That's incredibly arrogant. More arrogant than putting other lives at risk because you can't put your routine on hold, or alter it for a bit? No. It isn't. "Lift a heavy stone"? That's a joke, right? No, and it's part of strongman competitions. It's not dangerous if you have the right form and don't overdo…
He answered your question directly and then you change the goalposts. Clearly you hold the opinion that gyms should remain closed, and that's fine, but why even ask the question?