To be fair, this is still weird. If I have something that looks like a cold it's quite plausible to take more than 3 days to resolve and getting myself to a doctor would often be harmful for everyone involved. (Also, what would the doctor even be able to certify? "The patient presented sneezing and claiming a headache"?)
@creepy_owlet @ERDonnachie @danyaalraza
Which seems to be self-certifying with extra steps that do not make lying harder, so I don't see why not simply allow self-certifying.