No, not at all. My point in saying that is that people exploiting it are completely dependent on other people moving the lines to create the opportunities. They are also somewhat dependent on hoping that the people moving the lines are correct more often than they are incorrect. It's a two-pronged dependence, so as a parlay card bettor, you're never really in control of what the opportunities might be. You're completely dependent on the expertise of others, who you do not know at all.
Not sure how you arrived at the free play parallel.