Yeah people dont realize just how much of an edge top shelf alpha glass gives a trophy hunter until they use it extensively in the field.
But it all depends on what type of hunting a person does. Will a person wanting to just kill a decent buck or bull need optics that can clearly see small tines at 2-3 miles? Or optics that allow you to glass past legal shooting light when the big boys come out of the woods? No, theres no need for that. Mid price glass will help a person find some nice animals and luck might play enough of a part to help find a really big one.
The nice thing about a top quality spotter is that the low light performance is insane. You can glass on lower 30x-40x powers long after even the very best and most expensive binoculars have gone dark and are rendered useless. Ive tested this against one of the best binoculars on the market, the Leica Noctivid 10x42 that I now carry. Arguably the best glass in a binocular I have ever seen. But even the amazing glass of the Noctivid cant keep up with a Meopta S2 or Swarovski ATX in really low light. In really low light, I will use my spotting scope to "put a buck or bull to bed". When I finally cant see them anymore in the spotter or I get lucky enough to watch them bed down after their evening meal, I can almost guarantee they will be there moving out of that same spot, or at least close to it, at first light. Hike up in the dark and be ready when shooting light breaks.