Really? That was your point? That iTunes doesn't somehow know what CDs you own and make them magically appear on your hard drive?
Ok, sure, I'll grant you that one.
Let me know if you want to make any other bold claims...
EDIT: Ok, sorry for sarcasm.
I did understand the point you were making; I was feigning to misunderstand it in order to make another point: iTunes doesn't own any music content (like D&DBeyond doesn't own any WotC content) but by adding significant and valuable additional functionality to your existing CD collection, FOR FREE, they persuaded people to keep their music collection there, instead of on a shelf. Then they were able to start selling them additional content.
Upthread I got some snarky responses about how D&DBeyond did all this hard work and they deserve to get paid for it. Sure. And IF I had been able to get access to the content I had already paid for I would have adopted it. I might have even paid a few bucks a month for the privilege. But I didn't want to
re-purchase the books I already owned.
(And now, several releases later, I own several more expensive hardcover books. If I had been on D&DBeyond I probably would have bought the digital editions. I kind of wish I had just eaten the cost when it was only a couple of books. And three or four releases from now I will probably wish I had done it today.)
So, no, iTunes doesn't give me the music I already own; I need to do a little bit of work to upload it. But they do give me something related to my CDs...additional functionality...for
free, and they leverage that utility to then sell me more stuff. Which totally worked.
WotC and D&DBeyond didn't do that, and I have absolutely zero reservations about accessing illegal version of the content I've paid for. And I think there are countless people out there like me. I bought Xanathar's, for example, fully expecting to barely reference the physical copy. So you may conclude that, "Well, WotC got my money one way or another." Except that they and D&DBeyond are missing out on opportunity to upsell more services to me.