I had been riding for years before I took the MSF course and I still found it helpful... The first half of the day was kinda boring because we learned everything about the bike, then walked it around, then scooted on it, then started easing into having it carry us 100 yards, then giving it gas. If I didn't know what I was doing on a bike, it would have been super helpful.
Is it going to be the difference between you falling or keeping upright on your motorcycle? Maybe, I never had an issue before that course though.