Interesting, your first.
Since 1973, I've only worn full face helmets. Mainly for less noise, but also warmer when it's cold, and drier when it rains.
I have worn a half helmet teaching the Basic RiderCourse, only because it saved time not putting it on and taking it off all the time, plus the students could hear me speaking better without the chinbar.
And even as coaches, we weren't riding faster than 25mph.
Only have that halfsie because I won it as a door prize at some event, I would not have bought one.
No judgement, just my preference.