"Need" vs. useful.
My wife doesn't "need" a AWD car, but sometimes it is very useful getting to her patients homes in the winter, or when they live up in the hills on muddy dirt roads.
Before she had it, sometimes I had to get up early and put chains on her car, sometimes she stayed home, or sometimes she passed them on to others more capable vehicles.
99% of the time it isn't "needed", but that 1% can be a significant amount of time and effort saved if you have it, sometimes it can be very useful. All depends on when and where you ride.
"Take care, sir," cried Sancho. "Those over there are not giants but windmills".