Yes, this is a bit of an issue within the guides not just this one but many!
If you really follow the guides through within the one system you'll see the core is the same across them all: Steps - A to B to C ... Its just the last part that will be a bit different. But lets say the given task needs steps A, B, C but not D, then back to Step E, F & G of the core then the special steps for the given task (H & I). This is where the guides all fall down as you can't hide a step or a collection of steps in the middle without upsetting the other guides based on the same core. When I took an existing guide to tweak it to build a new one I faced this exact issue!
So I think we need to create an enhancement request to allow a means to hide steps. Then we can hide the I/O board steps as not needed.
It would be helpful if we can also slide in unique step or two but only within the one guide or its offspring.
I would also like a more graphical way to see the guide as a set of thumbnails so the complete guide is visible.