I have felt that what should limit the distance of the shot is a number of factors. Bullet performance at impact, which is more about velocity than "energy." Making sure it is a shot in the zone of both heart and lungs. Even on a deer, the vital area is large because the lungs are large but the actual sweet spot is about an 8 inch diameter. In my opinion, even a really good shooter with a 1 MOA gun should shoot no further than 400 yards.
Which gets to the points of others here. Make sure you have gear that is up to the task.
On the other hand, even Aaron at Gunwerks now regrets his infamous video of his son using a 7 RM on an elk at 1,376 yards. They got the bull and harvested him but he was not happy with how the bullet performed and would not do that again, today. Some say it was just advertising for the Gunwerks 7 RM. To be fair, his son was always practicing at the 1,000 yard range they have access to.
I had another discussion with someone at a different time and it was like pulling teeth but I got him to put his foot down and say that 400 yards is the farthest you should shoot at any game. And, of course, there are hunters who get elk with archery gear, which is more like 20 to 40 yards, a tenth of the distance.
In my state, in the state drawing for mule deer hunt at the Caprock Canyon SP, they would advise that you need to be able to shoot at least 200 yards. Turns out the canyon is just scrub brush and rocks. No trees to hide in.
Going back to bullet performance, choice of caliber and bullet style can really depend on how you expect to shoot. Some bullets perform better at longer distances.
I have not been to that reddit or any reddit.