Why?

Why?

This is confusing anyway. Not sure why you qualify this with “if you don’t know the course”. If you “know the course”, you don’t need a GPS. So, a GPS would be a waste (not “fine” at all). You don’t need a cue sheet either.

There might be some utility if the GPS quits on you but carrying another GPS would be more useful. GPS units don’t quit (such that you’d need to use a cue sheet) as often as some people appear to think anyway.

There might be some value in having something list stops. But, while cue sheets include stops, you don’t need a cue sheet to have that.

One big problem with cue sheet is getting back on if you get off them. Properly used, GPS units help you avoid getting off course (easy to do with cue sheets), stay on course, and get back on course (cue sheets, by themselves, aren’t good for this at all

Once I started using GPS units, I stopped using cue sheets. I suspect keep using cue sheets with GPS units because they aren’t confident in using the GPS.

Since people are likely carrying phones anyway, a cheap and easy thing to do is load the course onto an app that uses offline maps. This can be useful if you get really lost or need to investigate options to the course.