[Daisy]

I think what they mean by that Nir is that not that you can stealth at 30 hiding but that you would not be able to start out with stealth as a skill—you would first need to have 30 hiding to train the skill via NPC.

You cannot learn or
use this skill until you have at least 30 in Hiding.
Because of this, you cannot select it as a starting
skill.

But honestly, who knows anymore. I was hoping other players could offer some input because I don't remember if in past shards we had this many checks... I don't think so, but I'm not sure.