While I agree the cancer risk is probably lower... I don't think we really know what the true cancer risk is for vaping yet, let alone the risk for other cardiovascular diseases like COPD and popcorn lung.
This product hasn't existed for very long, so long term studies just don't exist yet.
That said, there is some research that suggest caution is at least still warranted: https://www.lung.org/stop-smoking/smoking-facts/impact-of-e-...