"Anonymous. You've lost me here. how can I be stepping forward when I'm going backwards"
No one said you should be - that would indeed be very silly.
You tried to make some sort of claim about forward and backward actions being equal in size.
I corrected that mistake, by pointing out that on a dancer of at least moderate skill, the size of a backwards action that can be accomplished with good form and comfort will be larger than the size of the forward action that can be accomplish with comparable form and comfort.
On beginners the opposite is true - they think they understand forwards movement, but find backwards unfamiliar and puzzling. Then they learn how to do backwards movement properly. And then they realize that they have been doing the forwards movement improperly. Eventually, they start working on proper forward movement... and discover that it is by far the hardest.
Put simply, if you find large forwards movements easy, you aren't doing them right!