There still hasn't been a reason why not.

Well if you used your brain an thought about it for a second , why would you need trading ? Example: Trading goes into destiny , an you give your buddy all the duplicate exotics you have . Okay now what? He has all the exotics already ... What's the fun in that ? There isn't any fun in that , the point of this game is to feel accomplished when RNG Finally gives you that weapon you were after , that's what keeps you playing . It's bungies way to keep you playing , an grinding those strikes, raids , or whatever to try an get those missing exotics . Not to mention all the people looking to sell there shit on Kijiji an hen everyone has everything = broken game. [spoiler]theres your reason.[/spoiler]

So you didn't read what I wrote? No where did I say you could just walk up and trade with someone.