I agree. However, the other point being made, at least by some, is that men are wind-up ejaculation machines, and that's simply not true of all individuals at all times. Otherwise, as I pointed out, there'd be no market for "chemical assistants."
Speaking as an older guy, there are times when the guy is in the mood but the equipment just doesn't want to crank. I'm not at the stage of needing a "chemical assist", but I understand where a guy would need it.