My father and uncle have had these removed.They have no bowel issues, but this was just a routine colonoscopy as one reaches a certain age. The only indication I've understood, is that these polyps, require one to have a yearly colonoscopy to check for additional ones and monitor the situation. To keep on the top of possibly developing more complicated issues later (i.e. cancer). Its like women and their yearly mammogram.
Granted your husband's issue may be slightly different as I assume he has celiac disease. I would guess they'd remove any of the polyps found etc and keep an eye on