The external light with which Windows fills the world would be extinguished. You might as well not believe in fairies. Everybody is forced to distribute Explorer with Windows, but that is no sign of a monopoly. The most profitable things in world are those that children and men can see but lawyers can't prove. Of course, but that is no proof of predatory practices.
Nobody can conceive or imagine all the advantages of owning the operating system.
You tear apart the baby's rattle and see what makes the noise inside, but there is a nondisclosure agreement covering the unseen world of Microsoft which not the sharpest lawyer, nor even the united strength of the whole Justice Department could tear apart. Only profit, return on investment and ever increasing quarterly earnings can push aside that curtain and view and picture the supernal monopoly and glory that is Explorer as part of the operating system. Ah, Virginia, in all your computers there will be no other browser real and abiding. Explorer not part of Windows. Thank Bill Gates it is and will be forever.