Its because they're fucken addicted to dark patterns. I want to set firefox as the default. That means any file that edge opens I want Firefox to now open. Except, Microsoft doesn't do that when you set a different browser as the default. I'd rather it change everything and then I have to change the PDF viewer manually, than have to change six or seven file types manually each time. Thus wouldn't be an issue if I wasn't working at my first corporate job, if my manager gave a shit to do anything, and if my company would stop changing everything and breaking my images every other week.