My internal medicine doc said something similar about glucosamine, and said I'd be better off saving my money. Since dropping it, I haven't noticed any more joint pain. In fact, my joint pain is considerably less, but I think that's because I've incorporated a lot more serious stretching and more balancing exercises in my lower body routine.
The doc didn't say whether he thought creatine was good or bad, but my creatine levels were in the high range, so he told me to get off of it. He wasn't alarmist, but told me unequivocally to stop taking it, so I did. I've been off over a year and a half, my creatine levels are back in the normal range, and haven't noticed any change in my workouts or recovery. Like you alluded, I'm not trying to get yuge, and for the most part I lift in the 8-12 rep range to failure, so maybe creatine wasn't all that helpful for me. I do think that when I got back to lifting 10 years ago creatine helped me add on quite a bit of lean muscle in that first 8-10 week period, but that could have been all in my head.