I’ve only used a tiller when I was learning to sail. Since then I’ve only used larger ships with a wheel as the helm. You’re absolutely right that a tiller is an order of magnitude easier still.
The amount you turn the wheel is identical [0] with or without power steering, unless perhaps you have one of the weird variable turn ratio systems. In a conventional power steering system, the steering wheel is linked to the wheels, and the power steering applies torque to help you turn the wheel but does not change the relationship between the steering wheel and the wheels.
[0] Almost identical. The steering has some flex, and the amount it flexes is related to how much torque you apply. But this is a tiny effect.
My comment was explicitly about how physically difficult it was to turn the wheel. I had to crank it over far as well, in order to get off the highway.
