I occasionally smoke Nicotiana Rustica, or farmers tobacco; which is plenty stronger than regular tobacco. And it's less addictive, even helps some people to quit because their bodies finally get all the nicotine they've been craving. And not surprisingly it's forbidden to sell it in most countries.
Someone fucked around with regular tobacco, that seems pretty obvious from here. It's basically designed to hook you more effectively and make you sicker by raising the nicotine levels really quick and then dropping them like a stone.
Which I assume is exactly what they're doing with the vaping liquids/salts as well. Profits, returning customers; who gives a shit about the world?