So, I'll be the first to say you've probably got more long range kills in more varied environments than I do, by quite a bit.Hunting of course, or get 2 turrets made. Just dial while at the range, use the info for your average hunting conditions for a custom turret. I have several turrets for different bullets, that's a way bigger factor than the temp swings from the middle of course. BUT if you have one made at 45 degrees and 6k ft of elevation guess what? The difference is better than you can shoot the gun anyway at 600. The goal is to have a turret made that is the in the center, no one has a turret made for 10K elevation and -20, well maybe someone does if hunting 150k sheep in Mongolia, but not me. If you are going to hunt extreme differences from your turret, then dial to what you need. Again a custom turret does NOT change a thing, it's still clicks. A dope Card is a custom turret, but on paper instead of plastic. I have used the same turret all over the US, Europe, Africa, shoot well over 100 animals with the same turret, never once missed an animal under 750 yards that I was 100% steady on. I am not talking wind, that of course is the big factor. I would not take a 500 yard plus shot in heavy wind without some data. I would bet there are as many errors made using a Applied Ballistics inputting wrong data as a custom turret. Not to mention we can use 5 different apps, input the exact same info and literally get .5 to 1 moa difference in the information returned to us at extreme distances. Best info is real world data, regardless if it's etched on plastic or on a cell phone screen.
I'll also say that I'm not claiming that someone who uses a yardage turret is going to have a bunch of misses that you can point to and blame the turret. I'm saying that they introduce a systematic error that moves the entire cone of fire up or down on the target, which will push more of the marginal shots off the target and lower your hit rate.
The problem is that shifting your entire group down by two inches means that some of them likely miss the target off the side, and you have some shots that would be marginal hits turn into misses. Might not show up shooting 3 or 5 shots, but an aggregate of 100 shots would absolutely show a lower hit rate. Your system and shooter error is compounded when you introduce a systematic error (like a poorly zeroed rifle or a wrong muzzle velocity or any of those sorts of things we should also try to minimize or eliminate) that shifts the center of your group away from point of aim.
Rangefinders with onboard solvers are just as fast as distance and custom turret (solution displayed in the viewfinder in MOA or mils), and allow easy corrections for environmental conditions.
I agree that inputting exact elevation, temp, and distance manually into a phone app when it's time to shoot an animal is a stupid way to do it. Before I had a rangefinder with ballistic solver, I did drop charts for several different general environmental conditions that I'd commonly encounter. Tape to the stock, (or inside scope cap) and good to go.