They simply will not acknowledge that the pursuit of certain indulgences harm other people.
That is a rather broad statement or accusation that doesn't seem to be supportable nor discussable without specifics.
If you are about attempting to create a risk-free world/society where no one can harm you, either intentionally or unintentionally, I'm certain I don't want to share it with you.
That sort of "Utopia" is not for me. Others throughout history have tried to create such a thing and it's always turns into a Beast.
Personally, I think we are here in "Schoolhouse Earth" to learn and sometimes we learn best from the good, bad and ugly examples of others.
Sometimes accidents happen, too, even to people who are not under the influence of anything other than life itself.
All part of the lesson plan.
Nobody is talking about creating a "risk-free" world/society. We are talking about maintaining an existing functional society as opposed to letting it take a poison pill.
Of course, the way things have been going socially, perhaps a poison pill is exactly what we need. If I am of any divided mind about the legalization of drugs, this is the argument that seems most compelling in favor of it.
In my thinking, it is no accident that Drugs, Homosexuality, Destruction of Marriage and government spending us into poverty are all occurring at this point in history. They are simply different aspects of the same underlying cause.