Take a moment to consider what you seem to be saying here. You’re essentially pondering if it should be okay for a billionaire industrialist to willingly sacrifice the lives of between 1-50 people.
How low of an IFR would it take before you accepted that exposure?
If we lived in a sane world that valued EVERY individual human life above the self-serving dreams of an egotistical, arrogant sociopath, the answer would be zero.
Would incidentally exposing them to the common cold be ok?
Such a question screams for a sarcastic answer: in case you haven’t noticed, Covid-19 is not the common cold.