There are "recipes" for making your own nitroglycerin.....at one time literally ALL the chemicals needed could be purchased at the local DRUG STORE!!!
Even if this were still true today....how many would actually WANT to fool with the stuff???!!
The hazards of just SPILLING nitric or sulfuric acid would scare off any but the most foolhardy, IHMO...
Trying to extract nic appears about as risky as that other "one-pot" stuff!!!

Let's just say.....I have Nicvape "on my speed dial".....!!!