This is exactly what needs to happen to get Microsoft to stop doing things like this. How many sites not working properly does it take for someone to switch browsers? Maybe as little as 1, if the user really wants or needs to use that site.
That, and lawsuits (as others have mentioned, this easily could have resulted in violating HIPAA and other laws) could help stop behavior like this. But fines are the price of doing business for many companies, so outright blocking Edge may be even more effective.
I want competition in the browser space, but Microsoft simply has not offered that in over 15 years. IE obviously was worse than Chrome and Firefox in many ways, the original Edge still had worse W3C compliance and performance than Chrome and Firefox, and the new Edge is just a Chromium fork. They seem highly interested in getting your data, but not all that interested in actually creating an good product.
I'm not even sure why Microsoft is doing things like this at this time. If they wanted to increase the number of Edge users, this is not the way to do so. Are they content having less than 10% of users on desktop and just want to milk those users for all they can? As others have said [1], even if this was done locally (so that there'd be no privacy concern), this is is a terrible feature to have on by default due to the risk of inserting false details.
1. https://news.ycombinator.com/item?id=36295837