Ohh yeah I 100% agree then, the wikihow method is a bit of the diy at home crackhead way, but usually its extracting via butane or co2 in professional production, which both are volatile in oxygen and so if professionally handled can be entirely safe.

The issue arrises when manufactures try to add things for flavour and viscosity, which there's little regulation for and can cause problems.

But inhaling vaporuized oil specifically isn't too harmful, even if it solidifies in your lungs out lungs are fairly well designed to remove foreign contaminants, its another question whether they were designed to do this daily tho

edit: that's cool about nic tho, I'm only a stoner so I know weed best, but it'd be so easy to extract (tho I wonder if polar substances tend to be less volatile with the intermolecular forced holding things together)