In America it would disproportionately affect working class immigrants who get a measly two weeks a year to see their families.

We do not have and shouldn't have a zero covid goal and negative tests + vaccine checks are a reasonable enough. AU/NZ are outliers, but there are countries with strict border policies like them but that failed to contain their spread, such as Australia's neighbor Indonesia. That suggests there's more to the story that requires further study. Australia + NZ are not good case studies for Europe + NA to follow because they are rich islands with limited ports of entry that get less international air traffic in a year than busy European or NA airports get in a month. Furthermore I don't see what the major quality of life improvements for Aussies/Kiwis has been as a result of their overly strict policies. They have a statistic they can be proud of but at what cost?