Consumer protection laws that legislate a mandatory cooling off period are to protect people's rights to change their minds for whatever reason. That is fine.
The behavior that is being called out here is people exploiting a return policy when they never had any honest intention of buying the product, and no intention of ever keeping it.
The return policy is
mandatory, so free people can do whatever they want, try it out, send it back for whatever the reason,
which is personal, and not obliged to explain to anyone.
This didn't actually cross my mind as I buy what I want, when I want, never falling for the hype.
Good that OP brought this out. One can actually try any MacBook, iPhone or any other device, and sent it back within 14 days. I asked this question about buying something in instalments basis, from a law firm. The reply is interesting.
"Regardless of whether we bought the product in instalments or financed it from our own funds, we always have the right to return the goods within 14 days of receiving them. If we bought the product in instalments, i.e. we concluded a credit agreement together with the purchase agreement, this is a so-called tied credit, which will automatically terminate when the seller receives information about the withdrawal from the contract.
And what to do in a situation when we have already repaid the first installment of the loan? In such a case, the lender is obliged to return the funds paid to us. The remaining part of the settlement takes place between the seller and the lender. In a situation where we withdraw from a credit agreement, the institution with which we incurred the obligation is obliged to forward updated data to the credit information office within 7 days."
There's a lot of info in that answer, but I'm including only what's relevant. Technically as the OP says, people can abuse consumer law, if they want. Not everyone would do that, but it is quite possible.