I don't think it's a weird question at all. But also in some places it's actually not legal to leave it attached when not towing. Then there's the argument about it interfering with the way the vehicle is designed to crash safely.
I probably find the question weird because I spent my whole life around heavy equipment, trailers, and other towables. Every time a trailer was hooked up, part of the job was grabbing the hitch from wherever it was stored.
Grandpa used to say 'just don't be an asshole' and being an asshole includes someone who doesn't watch out for everybody else's shins.
I didn't insult the person asking or anything stupid like that. I explained exactly why the hitches are made to be quick release for removal when not in use.