Why is it hard to turn the steering wheel of the Toyota MR2 89?

Mk1 Mr2's do not have power steering. PS isn't really necessary in Mr2's because there is no weight in the front end (try turning the wheels of any front engine non-ps vehicle and you'll realize that your Mr2's a hundred times easier). Also, manual steering allows for slightly better road feel, it would be a pain in the ass to route PS from the rear to the front, and with only 113hp PS would take too much power from the motor.