Because many people in this thread have no knowledge or experience with these substances, so giving them accurate information is useful. I'd say it's even necessary given there's a group of enthusiasts that very clearly over hype the benefits and make absurd claims like it's impossible to have a bad time, to over use them, etc. I want people to have a balanced view of what they may be interested in trying, vs that nonsense. Otherwise they're possibly setting themselves up for a bad trip at the least.