Because not all experiences are prudent or morally correct. And certain experiences make one’s mind and conscience impaired to the point that I can’t trust them.
If someone is drunk out of their skull, and they ask me for the car keys, I’m going to say no. I don’t trust their judgment because their mind and conscience has been impaired and they’re then making decisions based on this impairment.
If someone is addicted to [insert any drug here] and they tell me “I can stop anytime” I’ll say they’re lying. Their mind and conscience has been impaired so lying is no problem for them.
Someone once said “There are three ways to learn in life. 1) books 2) learning from others and 3) putting your tongue on a frozen lamp post.”
I don’t have to experience 3) to know it is not worth doing