That's different and an unfair comparison. Android will open the system browser (which will be chromium based in most instances). It can't just open the default browser because that might break certain functions of android apps if the non system default browser is broken
>>privac+(OP)
That argument is surprisingly similar to the one that Microsoft argued back in their antitrust case [1]: that "the merging of Windows and IE was the result of innovation and competition" and "that the two were now the same product and inextricably linked".
For those who were too young at the time, Microsoft lost the first instance of that trial and eventually reached a settlement.
>>privac+(OP)
just checked, and Bing opens their own webview. I believe when Edge is installed they opt to use this first before. you get the option to use the default, but this is not happening without interaction.
note: not going to test this further... but regardless, why not use your default!