The company I work at has a smoking-cessation VR app, takes 5 minutes for some people to go from decades of unbroken addiction/40 smokes a day/first smoke within 5 minutes of waking, to not even being able to think about smoking.

Emphasis mine.

This is a meaningless statement.

I argue the only valid statistic is x% remain non-smokers at y years, something comparable to other methods.

And even if your company’s method does turn out to be statistically significant, that doesn’t necessitate everyone owning the device, only the clinic needs to.