Why do people want 4x4 trucks?

^title.
I don't understand why people want 4x4 instead of 2wd trucks.
Half of my friends have 2wd trucks and the other half have 4x4.
I have a 2004 Arizona Beige Ford Ranger w/sidestep 2wd truck and I don't need the 4x4. I gone muddin just fine in a 2wd, not successful in 4x4 (my friends let me try theirs).

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