Trace amounts of radiation do not poison the entire air. There is natural radiation everywhere, from rocks, from space, from our own bones. The amount remaining from the tests is not even remotely close to a health hazard.
It's all to easy to conflate 'detectable' with 'hazardous' when you're dealing with some of the most sensitive instruments on earth.
It's still poison. Check msds.
Just because there is already poison in the air, doesn't mean people can't put more poison in the air.
Just because the poison doesn't kill everyone, doesn't mean it isn't poison.
That's a perspective one can have, for sure. Something that's like 10 orders of magnitude below the known hazard level is not something anyone should raise alarms about to the general public though. Otherwise you'd have to go around policing every little bird that's exhaling COâ‚‚, etc.
It's all to easy to conflate 'detectable' with 'hazardous' when you're dealing with some of the most sensitive instruments on earth.
See: https://www.energy.gov/sites/prod/files/2018/01/f46/doe-ioni...