Btw. I'm investigating how I can map the traditional Vs CVT without doing too much confusion. I'm leaning towards keeping traditional and adding cvi notes. And a mapping page.
Let's see
When I got children I started singing for them almost every night. After doing that for some years now it's incredible how much better my singing has become (for me at least). Before that I didn't dare to sing when other people could hear me, but now I have no problems with that. I really enjoy singing for my kids and look forward to it every evening.
I'm perfectly willing to grant that this is the usual case, but since I'm not interested enough in being able to sing well to dedicate a lot of effort to it, it doesn't matter. I probably wouldn't sing if I had the voice of an angel.
https://www.google.com/search?q=ed+sheeran+graham+norton+bad...
There's so many examples of famous fat people that got skinny. I really struggle with this idea that it's all just muscle / muscle control to sing well under the lack of examples.
In my case, I've always had good musical hear but I always struggled with anything passing (I think) B4. Now, 3 years ago I joined a totally amateur choir and our (wonderful) teacher makes us do every week 15 minutes of breathing/belt exercises. Not a lot, and it was pretty hard getting the right coordination in the beginning but eventually stuck. And now I can reach D5 and even E5 when pushing out all the air I can. It's still a bit complicated to control the volume at that pitch but I would never ever imagined I could do it 3 years ago!
I'd argue efficiency is far more important for singing because the vocal system is very delicate and injury prone
To me it sounds like you were not using the proper technique or didn't warm up enough and your teacher wasn't able to guide into the right direction.
The reason why most people can't just naturally sing well is that singing is not a primary biological function, but a bi-product of a survival mechanism (vocal folds, aka airflow control / airway protection).
The muscles interacting with the vocal folds (thyroarytenoid and cricothyroid) have antagonistic function and work on reflexes rather than control, so the hard part of learning how to sing is to train them to coordinate properly rather than work against each other.