I'm a fan of carbines, just not in pistol calibers. Even with the longer barrel and extended range, it's still a pistol round with the typical trajectory of a bullet with large cross sectional area and low aerodynamic efficiency. As a class, pistol rounds tend to drop a lot more than rifle rounds. Holdover is more problematic.
I found after I was injured, and with the onset of advancing maturity in my 50's, that long walks to a remote stand were becoming a problem, too. And that included hiking overland with a long rifle. The manual actions weren't helping, either. The problem as I saw it was that once the rifle was shot, I had to break my sight picture to cycle the action at the precise time I needed to keep on target to make another shot. Chasing down a deer that would run to the nearest low ground to expire is normal, I don't need the extra work. I don't know to many who would risk loss of the animal, plus hauling it out of the low ground as being "more sporting." The answer to me was a semi automatic in a gun I knew well, that worked for the shooter, not against him, and that would allow another shot within a split second if needed.
That IS the AR 15, I assembled one in 6.8SPC, with a 16" barrel.
It's easier to load, insert legal hunting capacity magazine on an open bolt, release the hold back, flip to safe, down. It's easier to unload, depress mag catch, pull the charging handle back, retrieve cartridge. No cycling each round thru the chamber with all the nicking and scratching up the ammo, or worrying about the reputation of the gun and it going off. Bolts and levers can be made to do so much more than the AR by cycling every round out of the action the way we are forced to do.
The AR can be more ergonomic, more customized, carry the optic of choice, be the color you want, it much much more resistant to the elements, the stock won't warp, the aluminum parts can't rust, the barrels are available nitrided, the parts are designed to be easily broken down to clean much more than most civilian bolt actions.
I have a Remington 700 and Winchester 94 Saddle Ring carbine, I know which is easier to carry and use in the woods. I've had an HK91 and extensive experience with the M16 in 22 years Army Reserve duty, I'm quite familiar which is easier to shoot and get a repeat shot off more accurately. Taking the AR as a hunting rifle, most of the alternate calibers are designed and intended for hunting use, plus the .223 is still effective out past 100 yards if needed - with well over 1000 pounds of force quite a bit further. The pistol calibers run quite a bit shorter, with much more holdover, too.
I'd rather hunt with a durable carbine I won't be afraid to see get used. It's pretty much why the 94 looks so bad - it was, but blued steel and birch aren't all that after being somebody's truck gun for 30 years. I have seen 30 year old AR's and they don't look nearly as bad. They were designed to put up with harsh conditions, civilian guns are designed to need replacement to sell you another one.
Build an AR and you will like it.