First of all, please don't get angry, as ignorance is something we all suffer from to one degree or another and, unlike stupidity, is easily treated.
First of all you never own software - you merely purchase the physical materials (sometimes!) and a license to use the software in perpetuity (sometimes!).
Secondly, the very reason for stopping items from having officialish Real Life monetary values is so that people can't sue Mythic for losing them. If Mythic loses your account now for reasons not covered by your TOS, you'd stand a good chance of being able to sue for the money you paid in subscription fees raising the various characters. Your time has an absolute value in the game, and that value is the money you paid Mythic for the use of their servers and product.
If you were this Blacksnow Interactive, or whoever, you could also claim that you lost items in the crash, with vastly inflated dollar values. A regulated trade in items would lead to virtual items having real prices - and therefore a "market value".
Theoretically you could claim to have owned items that you never did - in the event of a server crash they might lose all your character info, thus stiffing them for thousands upon thousands of dollars worth of booty. All of a sudden you would have a case that you could get a lawyer interested in, because the stuff would be "$45,000 worth of virtual property" rather than simply a "really rare toothpick of wounding".
Mythic has control over its liability with account time, if you've racked up a lot of months then you've also paid a lot of dollars. Mythic has NO control over the invisible hand of the Otaku market for its virtual items - it has NO idea how much you're willing to pay to cheat a little, because such a threshold is entirely subjective.