Calling anyone naive is nasty.
No it isn't - it is a statement of fact. If someone isn't aware of what they are considering starting, that shows naivity. It isn't an insult. It is the same as calling someone inexperienced if they don't have experience of something.
I also wouldn't demand that someone do shadowing.
You might not, but most teacher training courses will. They want to know that the person has some idea of if it is likely to be for them. Shadowing is ideal - and clearly not always possible - but in the absence of that, current experience of running a Brownie Back or Scout Troop, or coaching a sports team, or teaching swimming or other similar activities is usually requested.
You can suggest it but you should be able to take a no, without rudely calling the person naive.
The only person I see being rude on this thread is you - trying to dictate who can post on your thread and how often. That's not how the internet works.
As an aside, if you get riled this easily, then teaching, or nursing, or any public facing role might not be for you.
Its their choice if they want to do shadowing or not.
Of course it is, but it is being suggested to you that using a week's annual leave to get a better idea of what you are thinking of giving up your job to do, is a good investment in time for most people. FAR better than giving up your job, taking a place on a course, then finding out it isn't what you thought it would be.
But I say again, without any experience in a school, or planning and delivering a programme to young people in a voluntary capacity, you might find it difficult to get on a B.Ed anyway.
Posters who are aware of that are trying to explain that to you, but you are just getting angry with them.
You do not HAVE to do shadowing before you start a new career.
Most careers, no, but teaching is different - see above
My cousin didn't shadow any engineers. He has started a degree course in Engineering, in his forties
So that is completely irrelevant to this thread then, as he hasn't started a teacher training course.
He has passed all off his exams with flying colours so far
Very pleased for him, but not relevant to this thread.