The primary purpose of a bolster is in its definition... "To provide structural support". It is there to protect the scales/handle. The bolster should be bombproof on its own and optimally, connected to the scale as well(pinned/dovetailed). Even the best epoxy can only do so much... not many can handle excessive shear force.
Batonning, is just another task a bushcraft knife is expected to do. There is no shame in using a tool how you see fit. It is not reasonable to carry a separate(proper) tool for every perceived use. The lure of bushcraft is to make do with what you have available. We get hung up on defining knife "abuse" or "proper use"... the fact is that it's not so simple. I taught wilderness skills and primitive living for decades, was an engineer and a machinist for 15 years and have been a knifemaker for almost 18yrs, now. I beat the living snot out of my knives.... batonning, chopping, prying, digging, throwing, etc...
It's okay to ask for a deeper explanation, after someone answers your question... but it did come off rather abrasively.