Which only applies to redownloading previously purchased items.
You can still sync whatever is on your computer or what you transfer from your iDevices.
Chris, you keep repeating that as if it somehow mitigates a "lockout" of a new Mac purchaser/user.
The fact is, when we purchased a new iMac, with the expectation that both my wife and I would be able to use our iTunes accounts freely (as we could with our old PC), we had not aggregated all of our music in one place, or on any device. In fact, most of the content we had previously purchased remained undownloaded, or did not exist on any device, in order to conserve space, or because the content was seasonal, or just because.
Of course, when purchasing a new iMac, a couple will have none of their "previously purchased" items downloaded. Which means that both users will want, simultaneously, to download all of their previous purchases. Unless you think that taking 90-day turns is acceptable and a good lesson in patience.
By way of an update from a few months ago, after arguing with Apple reps, they finally "lifted" the lockout of my wife's iTunes account, magnanimously allowing her to download her previously purchased items. (Thank you, Apple, for graciously bestowing upon us the blessings of our own purchases.) But then, of course, it locked me out of downloading previously purchased items from my account. Of course.
Since then, I've thought many times about making purchases of additional iTunes content, but then thought, "why should I?" if Apple isn't going to allow me to download this whenever I want? I've also cancelled my iTunes Match subscription for the same reason. Yes, I've lost all of my previously matched content, but if that's the price of escaping the so-called Apple "eco-system," then so be it.
I don't know why you continue to defend the indefensible.