Studies have long shown that what is good for the touch gander is good for the mouse goose. Fitt's Law has been known forever and touch makes considering it a requirement rather than just a good idea (bigger targets are easier to touch; bigger targets are easier to mouse to and click). The same applies to proper DPI awareness, in touch it is a requirement, for mouse users it has often been considered a secondary consideration.

Not every click in a business app or on a server needs to be a headshot to get work done. The business case should be clear: Fitt's Law is a productivity gain even for mouse users; DPI awareness is a good idea when even desktop screens are going 4k and beyond.