This is quite amusing. You're worried about what data Microsoft is sending back and forth from Edge, but not what Google is doing with Chrome? If you're very concerned with this there are far better browsers for privacy.
No that wasn't my point at all. The issue is soo much of Windows is selling your data nowadays and it literally slows down your computer. Windows loads up Edge on boot and automatically is transmitting data about you. If you don't sign into Windows they don't have that data. Chrome is an independent application which you can block from auto-loading with the Windows startup. I'm not broadcasting my data until I choose to do so. I'm not so much bothered about my data when I'm browsing more the fact that if my PC was compromised the operating system is full of my personal data. Yes I'm sure they perhaps could decrypt personal data in Chrome but from what I understand its more difficult. I personally don't want the operating system to know everything about me and keep broadcasting what I am doing. Yes I could use a browser that takes privacy more seriously too but I don't think you should blur operating system with browser they are separate in their security risks except Edge which is so integrated into the operating system. I like Windows but everyone knows its completely under attack all the time and it is fully understood by hackers, its pretty much an open operating system which Microsoft has to constantly battle with security updates. It is not secure to anywhere near the same level as Chrome OS or Linux. So with that in mind I do not want Windows to have my personal data throughout the operating system and broadcasting my data because Windows as an operating system is so security compromised. I've seen various videos where a local account was recommended as a way of improving your security. I personally think it is a big deal that Windows 10 will no longer provide security updates later in the year. Earlier versions of Windows they recommend you don't connect to the internet at all because you would be vulnerable instantly. Windows is utterly reliant on security updates unlike other operating systems so why put your personal data into such an operating system especially as Edge is fully integrated into Microsoft Services.
However worth bearing in mind Windows Enterprise versions allow telemetry data to be disabled but this is really about improved performance rather than security mainly. Less background tasks etc.
I realise though if I was really concerned about security to the highest level I would be using Linux but I've not actually found a version of Linux I really like that does all the stuff I want. I guess long term that is my goal.