Earlier quoted context omitted.
The cynic in me says it's because this way they can say "we tried" and not actually do anything. Antitrust lawsuits died the day MS got a slap on the wrist, and we've been paying for it as a society ever since. I really doubt the authenticity of this effort, but I also lack the expertise to judge properly so maybe I shouldn't be so pessimistic.
> the day MS got a slap on the wrist That "slap on the wrist" was sufficient to prevent MS from owning the browser.
They were going to actually break the company apart into different divisions to stop the vertical monopoly, but instead that's just become standard.