

Some of this is the fault of the design of Word. Even modern versions have direct formatting in the Home tab, to the left (chronologically “before” for people used to left-to-right paradigms) of the styles box. The styles box itself becomes rapidly less accessible if the window is not full sized.
If they moved direct formatting to a formatting tab, had a more focused concept of styles, and possibly repurposed some of the direct formatting buttons for quick style application, people would use them a lot more reliably without any training.
This would fit in perfectly in Dr Suess’ Hop on pop