Let me try making my post a list of bullet points.
* Libraries are allowed because technically it's not copying, and otherwise would be very illegal. Agree or disagree?
* Controlled digital lending is only copying on a technical level, not in the traditional sense where more than one copy can be accessed simultaneously. Agree or disagree?
* If CDL could somehow remove that technicality and do pure digital transfers, it would be fine. Agree or disagree?
* A better version of copyright would ignore that technicality. Agree or disagree?
If your whole point is that we could tear down all of copyright law and replace it with a system that allowed IA CDL, then, sure. We could do a lot of things. I'm not really here for that argument (because there just isn't enough to nerd out about in it, not because I have any problem with the exercise).
But as for the law as has existed in the United States for the last 50-odd years, I'm reminded of the words of a young Baltimore entrepreneur, who infamously said "you want it to be one way --- but it's the other way".
No, no, not at all.
In this situation I just want to change the definition of "copy" slightly.
(And to point out that slightly different definitions of terms would make libraries illegal. There's nothing special about the current definitions. In particular they're not the most straightforward definitions at all. Again, none of this is about radical change, just looking at where small tweaks would get us.)