[1] https://www.rki.de/DE/Content/InfAZ/N/Neuartiges_Coronavirus...
I can't think of a better alternative given the current situation if the end goal is to get people to reduce contact and get vaccinated, short of a full lockdown for everyone (which I think is a lot less preferable). Whether this form of lockdown will have any effect remains to be seen.
Unvaccinated people will just meet privately at home and get infected. It’s just the wrong move at the worst possible time.
they are anyways
What's so special about shopping that it prevents transmission of a relatively communicable disease?
https://pubmed.ncbi.nlm.nih.gov/?term=covid+fluvoxamine
Results are still somewhat preliminary and it isn't formally approved for that use but I know that many physicians are prescribing it off label and report positive results. The safety profile is good as a temporary acute treatment so there's little reason not to use it.
In the part of Germany where I live, 7-day incidence among the unvaccinated is 1726, which is much worse than last winter, and it's 112 among the vaccinated. Hospitalisation tells a similar story: The unvaccinated are suffering.
If that 1726 would rise as it did last winter, a lot of unvaccinated fools would die. A hundred thousand dead in three months, perhaps.
That is the alternative.
You said it was your ‘genuine question’. So I’m not sure why you need to see the argument. It’s an answer to your question, not an argument.
And if applied as here, I doubt many would argue that "forcing people to vaccinate" is a weaker measure than "impose some restrictions on unvaccinated" (although the former is of course going to be a strong form of the latter)