For me wearing a parachute is a constrain and carrying it is an act of will. For a skydiver not so much.
Again, my goal is "Ship working software", I don't care about optimizing at all, just baselevel "working" state of things, that's why I test things like reliability. But also again, our perspectives and understanding of terms seems to diverge a bunch, so much that discussing them seems relatively fruitless, at least seemingly to the two of us.