This is basically the Canada problem: we have tough rules for 95% of people, but we exempt 5% from it, so every variant quickly ends up here uncontrollably anyway.

Windsor Ontario has something like 1000+ health care workers commuting to the Detroit area that have been exempt from most entry test/vaccination/quarantine requirements. Same for truckers and flight crews and ~30 other groups.

I think this is only changing next week with an actual vaccination requirement.

If you want to go for covid-zero, go for it, but if you half-ass it, you get all the disadvantages without any of the advantages.