THE PROBLEM
For accompaniment, constant strumming can overwhelm the vocals and bury the groove without providing the breathing room and contrast that a song needs.
THE SOLUTION
Vary your fretting- and picking-hand technique to create accompaniment parts that are more dynamic, supple, and nuanced, both harmonically and rhythmically.
See the full lesson here: https://acousticguitar.com/video-lesson-get-more-from-your-accompaniment-by-strumming-less/