The majority of the time when people recommend going the Juco route, it's because it's a detour of sorts. The final destination being a 4-year school. The general idea is that if you couldn't go straight to the 4-year program of your choice from high school, you can go develop and play for 2 years at a Juco and then leverage that experience to get to the 4-year of your "dreams" or whatever.
NAIA are 4-years schools, so they're the destination; not a detour. And for many, a detour through a Juco isn't necessary. Not that one can't transfer an NAIA school and go elsewhere, but it's not the norm. NAIA's are better for those who want to make things like education, staying put/not uprooting, comfort, continuity, etc priority. Much of more of a traditional college experience when compared with going the Juco route.