ding ding!I just explained why what you're doing means you are an asshole. You're doing the magic card equivalent of trading the island of Manhattan for some turquoise beads.
Sharks and people with no morals will always find a way to justify to themselves why taking advantage of another person is okay. Either that or they have psychopathy. But whatever the reason, you can only just be a good example and protect yourself from getting taking advantage of by one of these types of players.