The thing is, we don't know what kind of people would get hooked on drugs if all of them were legal. We don't know if there's correlation between illegality and inaccessibility of the drugs and their abuse by people whose life if awful.
> They are not hard to find.
Vast majority of people do not know where immediately get hard drugs from. Making them legal would make vast majority of them absolutely aware of where to get them from.
> Legalized drugs won’t cause your children or loved ones to start doing drugs, a lack of opportunity will.
Oh yes it will. Not everyone who lacks opportunities in life is willing to resort to illegal drugs right now. But if they were legal, many more would.
I am sorry, but from logical standpoint, your experience is is an observational bias. Looking at a society at large, from statistical perspective, legalizing hard drugs would make many more compelled to try them, purely by enabling them to do so.
Decriminalizing them, however, would surely improve situation, especially if the money spent on enforcement was spent on mental health instead – see Portugal as a great example of such policy.
BTW: replace "drugs" with "guns" and you sound like "guns don't kill people, people do".