What is more better on trucks 2 wheel drive or 4 wheel drive?

Now I see alot of 2wd Old Ford Trucks and I am like why are they a 2wd we're all trucks are mostly built with 4 wheel drive. Two wheel drive to me does not make any sense on a truck because they don't work properly an are technically never built to work. Four wheel drive trucks makes more sense to me as I advertise and built those trucks with four wheel drive. What is more better on trucks 2 wheel drive or 4 wheel drive?

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