Frankly, I have a hard time even understanding what you're arguing here. "Explain why having a nationwide computer system with next gen AI would be beneficial beyond record keeping?"
I couldn't even tell you what that question means, much less answer it.
I've never seen a straightforward, concise, and persuasive argument for why Medicare for all is unworkable.
It's a payment system that controls the practice of medicine through regulation and algorithms are a poor substitution. Trivial example of one minor cluster. A gerontologist does not use a recommended treatment because it would be harmful at best on a particular payment. To be paid for legit services an extensive report must be filled out every month to justify a medical no brainer. Regulations require that practitioners themselves have to fill out this paperwork repeatedly. She's one of the best, or was, but one word day a week filling out nonsense? There's no medical reason, no "one drawerful of paper for a hospital". One day a week trying to figure out how to get the proper medical treatment in spite of insurance including government programs.
Expand that to every person in the nation? People will find other things to do because they aren't whipping boys. That's one problem.
But your "I don't know what that means" shows you pretty much equal in knowledge of most Americans and politicians.
Know what one thing could be done to most improve care is? On a regular basis a trained professional, not a doc or provider, sits down and spends one and a half hours or more talking to the patient. Yep. The "let's get the most value by having the most people seen in a unit time" is counterproductive, but it looks good to bean counters. The interviewer is looking for things unrelated to a complaint, like maybe they are jaundiced but have a foot complaint. Preventing or mitigating diseases before it would be known otherwise. Let's see you are taking medications from Dr. Spock- "Wait, who? I don't know who that is". That's your cardiologist "Oh I ditched him". Happens all the time. On and on and on.
But spending the necessary money for something that cannot be rushed. Medicare simply won't allow for that rational level of care as things sit.