I come at this from a different perspective than many hunters.
I spent 16 years in our special operations forces during the GWOT. When we weren't conducting operations we were training on a wide variety of tasks. Train train train...do do it for real....then right back to an endless training cycle. When I got injured overseas I spent a couple years running the training courses at an institutional level, and I continued with firearms training for high-level users after I retired for a few years. Some people have delusions of grandeur where they think they'll hyper focus and pull something off in real life that they haven't trained for...they fail at best and die at worst. Confidence without skill is called hubris, and it's never an enabler. So we train. It's not called "safe game" for a reason, right?
Performance is byproduct of training. Shooting is pretty simple in concept...apply the fundamentals for a given discipline. Pull the trigger without moving the sights til the bullet clears the muzzle. Given the right equipment (a zeroed rifle capable of your required level of accuracy) you'll hit your target. All we are doing in field conditions is making the application of these fundamentals more difficult to apply. Could be stress, could be fatigue, could be environmental conditions...whatever. Field shooting and range shooting are symbiotic. You have to do the exact same baseline things to make accurate shots. The better you are at it on the range, the better you are at it in the field, they are inextricably linked. It's just more difficult.
You have to train smart. Practice doesn't make perfect, it makes permanent. So if practice makes you worse you just don't know what you're doing and you need to go back to the fundamentals. You've built a mansion on a cardboard foundation. Only perfect practice makes perfect. I would, of course, rather be walking around Africa with my gun than practicing mounting my rifle on sticks for three hours. I would rather be glassing for sheep than generating data and dialing in guns at the long range. Shooting a brick of .22LR a weekend out of a small-bore analog of my 500 Linebaugh hunting handgun is tedious during the summer, but I do it.
I've never once thought "I spent too much time getting really good at basic shooting" when it was time to take a challenging shot, and my life and livelihood have revolved around shooting for three decades at this point.