most people spend too long all day hunching their shoulders because they're typing. They would be better off if they didn't bring their hands closer together. That's the whole advantage of split keyboards too.
Split keyboards are a much better way to accomplish that, though. Standard keyboards end up pushing the home row way off-center no matter what, which for me at least is uncomfortable for anything but short bursts of typing.
I agree unfortunately at the moment there aren't any wireless split keyboards in my budget and my history with keyboards is such that I consider them consumables and paying $300 for one is too much for me to consider.