Sure, but none of that really answers my concerns. I get the logic behind it, but I don't think the foundations are demonstrably strong enough to rest all that on. At least in the eyes of a large percent of the public anyway. Everyone knows if you hit someone going faster in a car, they'll likely die. I don't think the perception of the mask thing is anywhere near the same in society. You have to remember that our medical officers and government spent weeks and weeks downplaying the importance of masks citing 'little proof' of their effect on all of this, only to one day a u-turn and say they are.
They've literally not shared any empirical evidence to the public to show why they've changed their minds too. You can't blame the public for being highly cynical as a result. Putting people in prison for this would cause ridiculous amounts of unrest. They've absolutely handled it terribly. What we need is a campaign around why they are useful, presenting data, being honest about why they never recommended them in the first place (PPE shortages, but that's political so they won't fucking admit to making a mistake) and then maybe some will change their minds. As it is though, they've destroyed all confidence in them for many by their own mistakes. Put people in prison for not wearing one now = an even angrier, more segregated society.
Also, once again, this criminally inept government having that power is terrifying. It would be abused, or something similar at some point in the future would be anyway.
EDIT - once again, I am pro masks, just in case anyone thinks i'm arguing against them. I'm not. I think before it gets to the point where you're throwing people in prison, you should probs try and communicate why they're important in a useful manner first.