You can’t reason (or evidence) someone out of a position that isn’t based on reason.
And if planes are making visible clouds one day and the other not, it is obviously because they are not spraying all the time, etc.
So no more clouds would not make people smarter, but it might actually reduce this particular conspiracy spread.
Well it's one of the main last-mile mediums people use to doomscroll their propaganda feeds, so... yes?
It's some form of motivated reasoning. The same people who will tell you a secret cabal of billionaires controls the government will roll their eyes if you bring up the heritage foundation.
I would find CT believers fascinating if it also wasn't sad. I have one in the family and she lives below the poverty line and has been missing most of her teeth since her late forties (fluoride works, people).
Furthermore https://duckduckgo.com/q=toxicologic+assessment+of+jet+fuel
and https://en.wikipedia.org/wiki/Fume_event
Are the fumes less bad, when they don't leak into the cabin by bleed air, just blown away backwards?
The solution to pollution is dilution (in the atmosphere)? With the current amount of global air traffic, no matter if civilian, or military?