Every time someone in this thread has claimed I don’t know the copyright laws, they have strawmanned me. And there have been many of those times.
I understood your argument and it seems reasonable to some extent, but it really doesn’t hold up under analysis.
If you get permission from the copyright holder/owner of the product to preview the material before purchasing then you’re completely fine.
It’s the same with any downloading. If the company that is selling the product gives you written, explicit permission to download the item for free and use it for whatever you want – as some pop bands have done with their CDs recently – then you’re ok.
If you don’t know what the policy is, then you have the duty to ask permission. If the copyright holder says “no”, then you can’t seek out an illegal copy to preview.
That’s just common courtesy. Ask the people who produced it and who own the property rights to it.
Otherwise, we’d all just be creating our own laws for other people’s property.
Additionally, downloading an electronic file, while not the same as stealing a material asset (where you would have a kind of loss), certainly is a loss in many other ways to the owner.
First, the product is devalued because free, illegal copies are being passed around. This also hurts the reputation of the company that produced the product. Additionally, the downloaded version may not be of the quality and standard that the owner wants to have in the marketplace – thus it is devalued that way.
Finally, part of the reason to purchase some things is to have the privilege of seeing it.
How could your argument work (that it’s ok to “preview” something and then buy it if you like it) with something like a film?
We pay a ticket price for a movie just to get in the door. The price is based in part on the fact that you can’t just preview the file first and decide to pay later.
That’s an important part of the attraction of the product. You have to pay to get in the door.