I've been in the hobby for a little over 5 years and the gulf between me when I began and me now is huge. And then I look at people like the experienced guides you mentioned and it's night and day again!
They have access to the same information as the rest of us (sight, sound, general awareness of season and habitat) but their inference is so amazingly fast and accurate.
I’m casually in the hobby but I’ve been able to identify way more birds than I thought I could. Started with a small bird feeder at my house. Now, when I go deer hunting I turn on the Merlin Bird ID app and try to find what it’s hearing.
The bird feeder attracted way to many mice and rats. I wish I didn’t have to take it down.