Other European countries, and obviously China, have obviously ended up doing it. I doubt they'll become police states. This government doesn't want to do it, so this isn't about them wanting to control our lives.
No one wants martial law. It's just that they'd rather have that than have a whole lot of the population die or need ICU care, because the NHS couldn't cope.
I have MH issues myself and hate all of this. I hate seeing my DD1's disappointment that she won't get to have a birthday treat (we were going to arrange an ice skating party for her); it will just be a birthday tea here, the four of us, though I am arranging for her to have video calls with extended family and a few friends.
Most of all, however, I hate being ill with this virus. I'm willing to go with the best strategy to stop others experiencing what I'm going thro and worse.