Chris,
I think those are all valid points, especially the last one. For example several reports show that on average 50-100k people die every year due to preventable errors in the care of health care professionals. That's far more than the 10-20k for DUIs.
But for more context, lets specifically look at Mormon Church controlled Utah (where booze is forbidden for its members), and I don't say "control" lightly. They openly admit during legislation sessions that such and such bill is set for approval by the church, (for at least all the big laws, including all of the alcohol related laws). Yes that is fact, I didn't believe until I lived here either, the Mormon church explicitly approves all new major laws in the state...
And they have for decades, with a long history of cracking down on anything and everything booze related. Obscure laws like anything over 4% ABV must be bottled, designating bars as private clubs, illegal to serve a drink with more than 1.5 shots in it, to forcing new business to install "Zions Curtains" so patrons can't see drinks being made...the state has a lengthy track record of punitive booze regulations with no logical basis.
But on to DUI rates. Go to the CDC and look at the state rankings. Utah is in the top 5 best states year after year across the board for every category (underage drinking, DUI arrests, fatalities, etc.) Utah is already a role model for the rest of the nation, so when they make a new restrictive law like this, combined with their dubious and punitive track record, its suspect at best. Sure there are some Mormons who don't drink so the rates are a bit lower, but as a Mormon myself until I was 30, I can tell you most still drink because they don't actively follow the religion.
And ironically they also control the retail booze industry. Every drop of alcohol, that doesn't come from a brewery or winery in Utah, must be sold thru the state run DABC to the public, restaurants, and bars, at a hefty markup, of which they use the profits to subsidize several other state programs instead of re-investing in the DABC.
So yea, I might be a bit jaded over what happens here...but for good reason in light of all the bogus laws and how well the state already does in controlling drunk driving.