I would get one, but my apartment lease forbids them on "water damage" reasons. I've only seen a clause like this in my most recent lease.
The number of poorly fitting bidet attachment seats that have been badly installed I've seen is quite high. If I owned the bathroom and someone wanted to add a bidet, I too would have my concerns. A ban is crazy, but I think it's totally valid to at least have a plumber inspect and sign off on the work.
I put water alarms connected to my security system behind each bidet equipped toilet.
Not sure about Vietnam. Never been there, but Thailand is SE Asia too :)