From another perspective I wouldn't be in favor of higher taxes on vaping products because it would be yet another tax affecting primarily lower income people.
So, while I don't think it's a bad idea, I think I would need to do some more research on the ramifications before supporting it.
But agreed, in light of the current evidence that vaping seems to be better than cigarettes the tax should be lower, ideally pushing people who smoke to switch to vapes as an alternative
For the reason you stated here. It's more a conflict in personal philosophy I guess.