Inhaling a giant hit from a fattie and holding it in is probably worse than cigarettes.
I’ll have to take your word for it. I’ve never smoked, personally. The harm is still comparable, I imagine.
Apparently none of the people insisting weed does not cause lung cancer have ever cleaned their bongs. It is just as bad as tobacco for the lungs. Clean a bong and try and deny it.
That said, what you inhale is none of my business if you stay off the roads.