the tips are not glued on. at least several sets of mine were not. it's just held on a taper. you need to heat them for some time, as the nylon material transfers heat very slowly.
they will probably not "whack" off with impact, they should more easily twist off though. sufficient grip can be had on the pole with rubber kitchen gloves or such. the pole tip can be held quite nicely in a small'ish pipe wrench. (no NOT wrench/vise on the shaft)
Leki tips twist right off, it's not an issue.
more : consider that for every user that changes his tips, there are hundreds whom do not, and never will. but for 100% ALL of us, if a tip falls off, it's a big pain in the shorts. For Leki, this can generate perhaps a whining customer. It's all bad.
so : Leki is going to do everything in their power to keep tips from coming adrift in use.
good luck !
v.