Huh? I'm not hunting New Mexico this year. I only included the link because it was the easiest explanation that I thought would satisfy you. These tags have nothing to do with outfitters, and I'm still concerned that you don't understand.
Lets say you wanted to hunt the rut in one of New Mexico's best units. You're going to try and draw 16A, 16D, or 17. Know what your best draw odds are in those units without a guide? 5% (the low is .5%). So you will apply, on average, 20 years between tags. Remember, no preference points in NM.
So what other choice do you have if you want to hunt one of the best units? Landowner tags. There are unit wide tags available for all of the above units and you would likely hunt the same public land as the guys fortunate enough to draw. Does that make sense? It doesn't have anything to do guides, outfitters, or fly crap.
Now as to whether those tags are worth the money? Capitalism is an interesting thing. New Mexico has some huge bulls, and better opportunities to get in the game than either Utah or Arizona. Frankly, these days, $5,000 would be at the low end of a high quality elk hunt that you don't have to draw.