nah it's this covid authoritarianism that blows risks out of proportion and usually with scant evidence and does it in a categorical way that ignores impacts which often have WORSE harms than the thing they're trying to protect against

in the flight case, it could very well be that if you were able to count, there's more harm from DVT from sitting in a seat all flight, versus getting up to walk around regularly and potentially being hurt by turbulence

just a cursory search shows ~300 serious injuries in 30 years tracked by the FAA