I'd say this is true. One example of an exception might be riders to who ride more aggressively, have good upper body strength or a lot of power, people who do a lot of high speed descending, etc. In cases like this, the rider positions their weight further forward on the bike so that there is more weight on the front wheel. Having a good bit of weight on the front wheel makes the bike feel more 'planted'. Having enough weight on the front wheel make it so that the bike grips better and turns more intuitively especially on 'squirrely' bikes (bikes that have responsive steering). On such a bike, it becomes more important that you make steering input more smoothly and that you steer with your hips more than your arms.