Nicotine is far more regulated and generally won’t lead you to pass out behind the wheel of a car or drown in a hot tub. You can’t even smoke in the vicinity of many buildings, but kratom? It’s basically an unregulated opiod that anyone over 18 can get and use wherever, whenever, with little to no control over what’s actually in it because it’s not food, medicine, etc.
Also you can just walk in a farmer's field, pick a mushroom out of a cow patty and boom - you're high AF! Someone should regulate cow shit, there's little to no control over it!
So are most OTC drugs. Doesn't change the fact that you can get them everywhere. And long term nicotine use causes dependence similar to heroin.