Because there is this really cool trade that NMDGF has that it does with landowners, if they choose too, where a tag is only good unitwide if the ranch it came from is also unit wide.
This has opened over 500k of private land acerage to public tag holder. Not just people that know the land owner or the select few a ranch chooses to sell trespass too...everyone gets more land access.
A lot of these unitwide private ranches open up easier acesss to tons of public lands too. Some even create access to landlocked public lands.
Additionally, it creates two more opportunities to hunt a full unit, via land ownership or your ability to get a tag by purchase, trade, gift, etc. Plus the draw.
The currently system promotes habitat improvements on private lands too and I wish they would find a way to expand unit wide interest. Use the existing system to encourage more ranches to go unitwide. Give me more acres to hunt, not take it away!!
One way I think they could do this is in the scoring system give unitwide ranches high scores, like a bonus point, or priority in the landowner draw.
EPLUS is the best system in the west overall though.