Yes an authoritarian police state enforcing quarantine in Germany sounds like a great idea. I'm sure there are historical examples they can follow.
In many countries, compulsory quarantine was enforced. In Germany it never was, but they still presented it as compulsory and held out the possibility that it might be enforced.
I don’t wish they had enforced it, I wish they had been honest about the arrangement.
Almost all western governments did a piss poor job of preventing facts which why we're in the situation we are now. They appear untrustworthy because they've presented partial truths or completely changed their stance throughout.