I seriously question if anybody really "needs" top quality optics. From my experience at the Birdwatching Digest-sponsored "Big Sits," the birder who each year correctly identifies the most birds has the least expensive binoculars. Why? Because he has the best ear for bird songs, he is the best a mimicking birds to get them out of the woods and into the open, and when they appear, he is the best at identifying their field markings. He owns a humble but competent $200 Pentax 8x36 NV, and he is the envy (NV) of his fellow bird club members who own expensive Swaro SLCs and ELs.
I'd like to conduct a double blind test with an expert birder using a cheapo Nikon 7x35 Aculon and a $2K+ Leica 7x42 Ubervid (or EDG or SLCneu) and find out if he/she really can ID birds better with an alpha than with the Aculon under sunny skies. Get a statistician to calculate how much better and see if the cost warrants the better ID performance. I can take a not so wild guess that it would not, not even close.
Are the alphas better built? Of course. Are the optics better? I would certainly hope so, but $2K better? Well, that's between you, your mate and your wallet. But the point is, nobody "needs" an alpha anymore than anybody needs a Mercedes.
Here's another test I call the Piaget Effect. It's a bit sneaky, but it would be interesting to try. Let's say someone replaced the green armoring on the 8x32 Sightron II with gray armoring and put a Zeiss blue shield on it and then handed them out free to hunting guides, telling them, this is Zeiss's latest and greatest, an 8x32 SF. Just in case the hunting guides catch on, let's make them confederates in the ruse. So they start using the new faux 8x32 SFs, and their duckling hunters take a look through them. How much you want to bet that right after the hunt or even before it's over, the hunters are on their cell phones ordering an 8x32 SF from their Zeiss dealer?
This is not a put down of hunters, the same thing would likely happen at a birding event if Steve Ingraham had a faux 8x32 SF. The phone at Zeiss dealers would be ringing off the hook.
Why? (I'm glad you keep asking questions
). Partly human nature, partly Madison Ave. Everybody wants to own "the best." If that weren't true, we'd all be driving Honda Civics, realizing that spending more for a car is simply throwing money out the window.
Brock