You can NOT become a better singer by only experiencing the pleasure of training and singing.
Nothing in all the world is more dangerous than sincere ignorance and conscientious stupidity.
Martin Luther King, Jr.
To belittle knowledge and the way things work, is a popular tactic that is occasionally seen by some people in the singing industry. It is interesting to note that people who make the "less knowledge and understanding is not very important to learning how to sing", argument all suspiciously have one thing in common. They don't have a product to sell and/or if they do, the offering lacks depth. They don't choose to explain how and why the singing voice does what it does.
You will never see CVI, EVTS, TVS or programs that offer some scientific insights publish a video or forum post that makes the claim, "... you don't have to know all that complex stuff, just let your inner feelings carry you through. That's all you need. It should never be hard, it should always be easy. You can just will it to happen. Don't bother learning any of the science of singing"... The world's best training programs will never say that.
There are two things that motivate people. Pain and pleasure. Some people like to be given permission to avoid all the pain from voice training and learning how to sing. Promise them that they can learn to sing better without any "pain", ( practice, commitment, doing the same thing over and over again, reading a book, paying attention to a lesson, understanding a methodology, understanding how vowels work, etc... ), and they happily get on board. They don't want any "pain" associated with training or learning how to sing better. They only want instant gratification and pleasure. By no means is everyone like this. However, for those that do respond to that message, there will always be someone there to "sell" it to them.