I am a car enthusiast so don't think I'm off the deep end here, but I would definitely argue that people love their cars as a tool to work in the society we built with cars in mind. Most people aren't car enthusiasts, they're just driving to get to work, and if they could get to work for a $1 fare in 20 minutes on a clean, safe train they would probably do that instead.
Of course they wouldn't, owning and operating a plane is -incredibly- inconvenient. That's what we are discussing, tradeoffs of convenience and discomfort, you can't just completely ignore one reality to criticise the other (admiting some hypocrisy here since that ideal train system mentioned earlier only exists in a few cities).
Is this some culture or region or climate related thing? I’ve never heard of BO brought up as a reason to avoid public transport or flying commercial in northern parts of Europe. Nor have I experienced any olfactory disturbance, apart from the occasional young man or woman going a tad overboard with perfume on the weekends.
Should we restructure society so that having a private airplane is easier and cheaper, but if you don't have one you'll have serious trouble in daily life?
No, people hate being trapped without a car in an environment built exclusively to serve cars. Our love of cars is largely just downstream of negative emotions like FOMO or indignation caused by the inability to imagine traveling by any other mode (because on most cases that's not even remotely feasible anymore).