Ask HN: Why don't people learning to drive use simulators?

It seems to me that people should spend their first few hours of driving lessons in a simulator, instead of on the road:

-Less scary for learners.

-Less inconvenient for other road users.

-Safer for everyone.

-Probably cheaper for the driving school in the long run.

-Lower carbon emissions.

But this doesn't seem to be a thing, in the UK at least. Why not? Surely it can't be that expensive to create a simple car simulator with steering wheel, gears and pedals. And the graphics could be pretty basic by modern game standards.