Tiles are amazing for touch screen users. Some of us enjoy touch screens and tiles facilitate ease of use much better than trying to click a much smaller blade or link. Microsoft is committed to accessibility for their products. Try to think of features outside of how they’re presented to you. Many features facilitate ease of use or accessibility enhancement for the disabled and handicapped.
For TOUCH screens. Not PCs. They are to different interacting experiences. If you have a mouse the tile TOUCH feature is ridiculous.
Yes, but only Microsoft would be so inept as to break a good PC UI trying to provide a good UI to mobile device users.