Read it how you want, you clearly missed the very last line on that page. Ask your recruiter why the Arizona & North Carolina National Guards will direct commission nurses, while your state won't. What state is this by the way? If you're uncomfortable answering publicly, pm me.
As for my personal experiences with the guard: The guard is very incestual and self-serving. I had soldiers in every guard unit I was in, whose civilian, guard-oriented jobs involved supervising their weekend squad leaders. This tends to muddle the work dynamic. Soldiers, officer & enlisted, who could not find jobs on the civilian side would milk mobilizations/AGR/ADSW/etc, leaving the readiness of a unit pretty much up to people who couldn't find jobs elsewhere. Add to this a tendency to learn leadership skills from movies and things just snowball from there.
Handling work/drill is the same in the guard as it is in the reserves; although the guard did tend to change drill dates more readily than the reserves. The difference lies mostly in funding: the reserves are much better funded and have more of a real world mission, with more variety in training/mobilization. Meanwhile, the guard is poorly funded, with numerous hands reaching in the collective pot; that is unless the unit is or going on title 10, but if you're relying on that, be a reservist.
After eight years in the army, four active, two guard, two as a mobilized guardsman (serving in guard engineer, artillery, and mp units): I chose to commission reserves ultimately because the guard recruiter told me all 66 seriers in the state were TRIPLE slotted. You should inquire about that. Since most combat service support (sustainment) are in the reserves, your promotion potential as a nurse in the guard is limited at best
Just so you can't say you were never told: you are being lied to.