I assume if there's a "foreseen" reason for returning it, you wouldn't buy it in the first place. Hence, I think the "unforseen" bit is unnecessary.
I highly doubt that Apple is overly concerned that maybe 1 customer in 1000 would bother with multiple returns. On the contrary its in Apples best interest to ensure customer satisfaction, they are far more interested in winning you over as a customer for life than they are with a couple of returns.
Its always interesting when people start slamming their fellow consumers in order to defend the big corporations. I dont believe in ripping anyone off, but in this situation then Apple is a company where "The Experience" is 50% of the product. And this has worked out very well for them.The reason Apple puts in the policy is so that people are completely satisfied with their purchase. It goes alongside their position in the market as a premium brand.