These shows are only good for entertainment. They are horrible, if not dangerous, models to follow.
My guess is that the money they get paid to 'act' like investors, overcomes their gross incompetence.
They've got to keep the cameras rolling, evidently, so they'll engage in the stupidest, most hilariously stunted (as in dysfunctionally short) negotiations, where the buyers (and sellers) are led down a primrose path by the agents, to what can only be described as a 'self-serving end for the agents themselves,' but nobody else.