It's easy to be nontechnical when you have a setup that works, and you record pretty much all the same things all the time.
But then someday something stops working. Maybe there's a weird hum that wasn't there before. There must be four or five threads on this BBS every day about problems like that. That's great for hobbyists; it's a good resource that we can kick around troubleshooting for a few days until the problem is found. When you have paying clients in the studio, it doesn't work as well.
The other issue with being nontechnical is the amount of time it takes to deal with session issues. Let's say you have a mic locker of 30 mics, and you get a novel source. Let's say the rock band you're recording suddenly wants to do an AC/DC cover, and they break out the bagpipes. Which mic do you use on bagpipes? Which room? Where do you put the mic? If you understand frequency response, polar pattern, microphone operating principles, room acoustics, instrument timbre, sound propagation, etc., you can make that choice much faster than trying every mic in every room in every position. Being quick on a session will save the band money, help keep that business, and get more new business.
I see many basic technical errors that inhibit people, and they don't even realize. Heck, I used to make all sorts of basic technical errors. But I did start by reading a couple of books, and that helped quite a lot. I mean basic stuff in Huber's "Modern Recording Techniques", and the manual for my DAW. Nothing too deep into physics.
Here's one example, I see all the time people say low frequencies need "room to develop". Absolutely 100% false. Put your ear one inch from a bass cab. Hear any low frequencies? I thought so!
What is true is that in a small room, you will have significant peaks and nulls, and if you put a mic in a given position, maybe you'll be in a null and it will sound like there is no bass. If you want to mic the cab from 2 feet away, you have to either experiment with mic position until you find a spot where the room response is relatively flat, treat the room, or move to a larger room! But the advice you would derive from "bass needs room to develop" would be to move further away, which could very well make things worse!
The correct technical answer would be to move the mic closer to the cab, not further, where the direct sound is so much louder than the reflections that standing wave cancellation occurs to a much small degree.
But you already knew that, didn't you
