Not only would it be for Their Own Good™, but if it saved just one innocent life due to reducing the load on the healthcare system, it would have been worth it.
/s of course - I'm not a lunatic.
There's so many people who seem to draw a completely arbitrary line between authoritarianism and paternalism despite them being exactly the same thing with different justifications. I don't care if it's "for my own good" or "because I said so", I oppose authoritarianism in general on principle rather than justifying authoritarianism towards things I happen to like with a different name.
I lost 80 pounds eating mostly hot dogs and kimchi. I doubt the government would prescribe that though.