Imagine the goodwill Microsoft could garner with advanced users if this was a simple mouse click during the installation. Advanced Install > Minimal Install
Nowadays, people simply don't have the money to shell out hundreds of dollars for Windows, Office or the Adobe Suite (the CS6 Master Collection was like what, 8.000$?) any more, and so it's cheaper on paper for everyone to either have subscription models (like Adobe or MS Office) or "freemium" models (Windows). Obviously Microsoft has to make up the difference in income somehow, and they chose to go the advertising route. Offering an easy way to get rid of all the invasive advertising and tracking would kill that golden goose.