I’ve head some doctors say it can cause cancer in the soft tissue indide your mouth and cheeks.

[Edit] Why the hell am I being downvoted? This is confirmed information.

From the link:

“It’s not only tobacco smoking that can affect oral health and have other health risks. When vape juice is heated it can potentially damage enamel and irritate soft tissue. As the ingredients tend to be thick and sticky, vapers may be at a higher risk of developing tooth decay and gum disease,” Dr Brown said.

That is a far cry from cancer, which your link makes no mention of.

It also says:

The oral health risks of dry mouth are compounded if people consume sweetened drinks, such as flavoured milks, energy drinks and soft drinks instead of water to combat the effects, which can then provide a greater food source for bacteria.”

So if this is what you’re hanging your hat on you better fucking only drink water my dude.