When someone calls and I expect it to be 60 seconds or less, I don't wanna go fumbling in my bag for 30 seconds to find the headphones and spend another 20 making sure they hook up to my phone properly.

Plus, idk about hearing issues, but I have epilepsy and my seizures increase when I have long calls with the phone against my face OR with TWS earbuds in, which can apparently (and not too uncommonly) be triggered by the type of radiation they put off, even though it's at very low levels. But just 3 inches further from my face and no problems. I know that's not why a lot of people do it, and I still try not to in public, but there are various reasons that someone might.

I am sure this will get downvoted to the lowest level of hell, but when it comes to people doing this without a medical reason/just based on preference, I also just don't know why a minor annoyance triggers such major anger in others. If I'm on a train for an hour and someone is talking the whole time, that's annoying no matter how they're doing it. If I pass someone on speaker in the grocery store, I don't really let that 12 seconds affect the rest of my day, certainly not enough to harbor such hot feelings about it.