There is the risk of tick transmission of Lyme disease in tall grass. I suppose you can pretreat to prevent contraction, but mowing grass means you don't have those threats/hazards to worry about.
I still hate lawns and wish more would be native, but I wonder if there's a way to grow a native lawn such that you invite the good wildlife and keep out the bad. Would need a biologist to chime in
I feel like this can still be a native lawn depending on which biome it's in. Seems more desert like than a prairie/forest type "native lawn" you might traditionally think of.
But yeah native can look different depending on location so I might be ok with this