50 years ago general public was not aware that smoking is that bad as we know today.
For a lot of things we don’t know the real consequences or full price.
My parents were smokers - can I blame them for their smoking habit that had negative effect on me, on their health?
Well not really because they never had a bad intent.
When they got smoking induced health issues were they able to make a new decision? - Not, it was too late.
Every decision boils down to one of four types of decisions (philosophy 101):
1. inconsequential and routine (what color shirt to wear)
2. inconsequential and once-in-a-lifetime (what color shirt to wear _today_)
3. consequential and routine (which route to take to work)
4. consequential and once-in-a-lifetime (who to marry)
The thing is, 1 & 2 can be and usually are consequential; it's just that you lack the ability to detect the consequences. Usually. I met my wife, on the beach, with some friends. The decision that led there, I thought, was inconsequential at the time.
But yes, your information will always be imperfect. I have scars all over my body from doing things that should have been fine. I've nearly died and somehow escaped (or been rescued from) the situation too many times to count. You have to live with consequences and not all consequences are knowable in advance; and for that matter, not all consequences are bad.
This is also the boiled down version though, so I'm kinda curious what you see in it and how it could influence the bigger picture.