Per their terms and conditions
The Services are not intended to tell you anything about your current state of health, or to be used to make medical decisions, including whether or not you should take a medication, how much of a medication you should take, or determine any treatment.
https://www.23andme.com/legal/terms-of-service/
It also seems to be a data harvesting machine that probably has ties to Google
Why aren’t there a bunch of bluesky instances? Genuinely curious, cause after a couple searches I found guides on how to self host bluesky