What research? From whom? The WHO basically says the same thing as the CDC:

For symptomatic patients: 10 days after symptom onset, plus at least 3 additional days without symptoms (including without fever [2] and without respiratory symptoms)[3]
For asymptomatic cases[4]: 10 days after positive test for SARS-CoV-2

From: https://www.who.int/news-room/...

While I agree with some of what you are saying. The CDC disagrees with you about how long people are infectious. "CDC recommends that isolation be maintained for at least 10 days after illness onset and at least 3 days (72 hours) after recovery". From: https://www.cdc.gov/coronaviru...

I think in general I would rather have my condition categorized by a human with a moderate amount of training than a computer. Computer's are good at doing lots of things but for something like this I think a human who can use judgement on borderline cases would be better than an automated system. The computer can make a suggestion but the final call should be made by a person IMO.

The internet isn't the only medium customarily used for software interchange. And they are allowed to charge a reasonable fee for duplication and distribution. (See GPL section 1.) If they really felt ornery, they would be perfectly within their rights to charge you for the physical cost of a bunch of floppies, and the time (at minimum wage, or even higher,) some flunky had to spend copying onto those floppies.

I think saying floppies are a "medium customarily used for software interchange" is at this point a bit of a stretch. I don't know of any major software that is currently available via floppies. Also the Majority of PC's no longer come with a floppy drive. Much like reel to reel tapes (yes I know some palces still have some but mostly for "legacy" support) floppies are now a thing of the past.