Earlier quoted context omitted.
Defaults are incredibly powerful, Safari and Edge are the second and third most popular browsers next to Chrome. Chrome itself is a default on a lot of android devices. Speaking of android devices, Samsung Internet is 4th/5th most popular as it comes default on Samsung devices. To say defaults don't matter because Chrome is used on Windows is a bit absurd. Chrome in 2012-2014 was still trading blows with IE even afte…
I think you're confusing defaults with lock-in. Safari, Edge, and Chrome are native browsers tightly coupled to their operating systems. They can't be removed. Further, anytime a user has to connect to an account for email, calendars, and other essentials, the OS will direct them through the native browser app. This means the so-called "popularity" reflects little more than the number of active devices: Android > iOS…
Also Edge use being far lower in Desktop use indicates that there's little difference between defaults and lock ins functionally.