This is not a bold claim, this is just how it is.
If you ask any average gamer, "if you buy a game on Steam or on a CD from Walmart, do you operate on the understanding that you are now legally allowed to make as many copies of it as you want and sell those copies?"
The answer will unanimously be no. If they owned it, the answer would be yes. They might say they own it, but they will clearly and reasonably understand that they do not own it in legal terms, because they understand what they cannot do with it.
Some of them will understand that they can legally make copies for backups, but why would you need the law to tell you that it's legal for you to make a backup of something you own? You wouldn't.
You can buy a hard drive, but buying it does not give you the IP for all the technology that went into it. No reasonable person believes that would be the case, either. You can buy a car, but you can't then copy all the parts and start mass producing your own copies of that car. Do any of you go through the McDonalds drive thru and believe you now own the burgers, fries and all the packaging that goes with it to the extent that you can start up your own McDonalds with logo and all?
Whether it's physical or digital, even if people have contradictions in their head since they aren't lawyers, they understand enough about how things work to conclude that what they understood when they pressed the purchase button equates to not obtaining total ownership of all aspects.
It is simply true. This is so broadly understood that I don't even think you would need to use a jury. A judge could simply throw the case out at this point on that alone, if it hadn't already been settled in past legal precedent, which it has.