Or maybe I'm out in public with others and want them to listen to something but my dongle is at home so I now need to play audio over the speakers in a public setting.
It comes down to having choice and not being funnelled into overpriced wireless earbuds. Which Fairphone began selling with the release of the Fairphone 4, their first phone without the jack.
My Macbook, my work laptop, my e-piano, my Note9, my BTR7, ...
Don't get me wrong, I understand far too well why no new flagship offers the jack anymore and wireless/USB-C is truly amazingly convenient for the vast majority of users, even audio quality wise, but sadly we are still very far from either being universal, either because the standard is still 1/8 or 1/4 inch or latency is key (in the case of instruments both). Also, USB-C ports are finite so using the small 3.5mm port is often preferable. So just keeping the dongle plugged in, sadly not an option. Apple Dongle DACs are easily lost too, ask me how I know.
Am very far removed from the mainstream customer and accept that in any case, my dream phone would likely bankrupt whoever was dumb enough to bankroll it, so I'll just deal with the compromise.