Im not sure what planet you live on. They absolutely will. Cattle and deer are dumb. As a cyclist, I doubt you ever leave the city and actually think a significant amount of people buy them for looks.
Anyway, I grew up in a rural area (outside of Texas) where grille guards could be useful. Didn't see many grille guards back there. I even (briefly) worked at a farm before, literally shoveling manure.
I've lived here long enough to observe that grille guards are far more prevalent here than they are in other places, even other places where grille guards seem appropriate.
Also, as a fellow Texan, you're dead wrong. The majority of the people who have those have them because they have ranches and do need them.
Given that I live in central Austin, I find it hard to believe that most drivers I encounter with grille guards need them because they have a ranch. That would imply that many more people have ranches than I believe is true. Plus, I grew up in a rural area outside of Texas and rarely saw grille guards, even on farms.
https://www.amazon.com/High-Mighty-SUVs-Dangerous-Vehicles/d...
Also worth mentioning is the effect of these walls of steel on visibility, both for other drivers and for non-drivers. Lower visibility means shorter reaction windows means more collisions.
Oh, I don't think that's misunderstood at all. Safety is generally measured with respect to the occupants of the vehicle only, everyone else be damned.
Heck, there used to be a myth that in an impending head-on collision you would speed up because that would put most of the force onto the other car and reduce your own damage. (That's not really how that works, of course)
That's the advice for when you're gonna hit a large animal. Getting off the brake raises the nose lessening the chance the animal will wind up sharing the passenger cabin with you. It's not totally invalid but pretty dated. With the low hoods of modern cars Bambi is gonna wind up in the passenger seat damn near every time. If you're driving some 50s-70s brick then it holds more water.
https://www.caranddriver.com/features/a15118822/taking-the-h...
At the end of the day, the failure is with how our vehicles in America are tested and rated. Safety ratings for vehicles are only in "their class", meaning for instance that they don't smash a sedan into an SUV; they only smash sedans into other sedans, and SUVs into other SUVs. This presents a major asymmetry, leading buyers to think SUVs are safer, when that safety comes at the expense of other users of the road, including people on foot and bike.
A major step toward reducing fatality rates in a vehicle-person collision is to factor in pedestrian safety when evaluating vehicle safety rates.