Compromise: hobbits smoke both & lump them together as ‘pipeweed’
u never kno what ur gonna get when a hobbit offers u some “pipeweed”
‘pipeweed’ in the Shire just means ‘herbs u can smoke in a pipe’ and it’s common knowledge that there are pipeweeds that are smooth & relaxing to smoke and pipeweeds that’ll get you stoned and they know which is which.
For whatever reason only tobacco caught on outside the Shire so middle earth’s other smokers just took to calling it pipeweed bcos that’s what the hobbits they bought it from called it.
So then
Merry: hey Gimli want some old toby
Gimli: what’s that
Merry: oh it’s a kind of pipeweed
Gimli: oh sure!
*later*
Gimli: what’s happening