In general people have no fucking idea or just don't want to know.

You can lay out the evidence of all the ways cigarettes will kill a person and a huge number of people will go ahead and smoke anyway. We are not an entirely rational species.

People have a massive capacity for self delusion. Even then a lot of people who accept the truth of living under corporate and government mass surveillance think the risks are acceptable or won't be abused or are unavoidable in modern life. They are wrong but I can understand how their delusion brings them comfort.