Why? Because it isn't Google Chrome.
There some people in this world who feel Google, currently, are as about trustworthy as Microsoft were in the 90s but are more insidious and rather than just wanting your money and to control things they want you and your life and to make money from it by selling it back to you and anyone else.
Currently Microsoft are slightly less worse than Google in this respect and the browser is Chromium based so is guaranteed to be compatible with all websites and due to MS fiddling with the code, it will not have stuff in it that makes sites that compete with Google services (Apple, Microsoft and Oracle to name a few) work poorly at Googles whim.
You could choose one of the other Chromium based browsers but they will be dependant on the 39 Google embedded services that Microsoft have replaced with their own services.
Linux people have a choice to make with three basic options. Give your data to Google and use its services, give your data to Microsoft and use its services or do neither and use Firefox and chose which services you wish to use..
Choice is a good thing and should be applauded and embraced wherever it comes from and not derided because of past histories or personal anguish.
Biting the hand that feeds IT
