How would that change anything about Windows market share?

You don't think the bundling of windows with pcs has anything to do with their market share?

nobody is forcing these companies to depend on MS products and services

Many in regulated industries actually are forced to use crapware like Crowdstrike, to tick a box on the security checkbox.

if they'd used crowdstrike on linux they wouldn't be hit with BSOD bootloops now