The issue in those cases was that the bundled products were OS-enforced defaults. In order to avoid using Internet Explorer and Windows Media Player, you have to specifically intervene and customize your computer to change what happens when you click on links or open media files. I'm not entirely sold on that argument either, and it should be noted that IE's market share got eaten in non-EU markets as much as EU ones, but it makes some sense.

I don't think there's a comparable concern here. Teams won't open incidentally in the course of making a Powerpoint; there's no way for me to end up using it without an affirmative decision that it's the right messaging tool for me.