Why not legalize all these drugs and educate people how to properly use them (if at all)? Isn't this the same as with prohibition in the twenties? Or with contr

Why not legalize all these drugs and educate people how to properly use them (if at all)? Isn't this the same as with prohibition in the twenties? Or with contraceptives for adolescents? Does society really suffer that much if all this stuff is legalized?