I agree.
I ran 36's on my '78 with four inches of lift with no problems. I know comparing apples to vodka, but a 33 isn't likely a 33 even today. Just as the 36's of old barely broke 34" in most brands. The truck I have now does not have any lift (well 1" of body lift) and I've got 33-15 mud kings on it and I never noticed a problem with rubbing the few times I drove it off-road before it got parked behind the barn. It will rub at full lock to the left almost all the time however. A quick saw job takes care of that on the bottom fender corner.