1-Yes, I was talking about nursing students with my post. Unfortunately for you, a CNA who is also in nursing school does know more than you. They are actively studying these very things.
2-Yes there is a right or wrong way. That kind of attitude may be where the problem lies. If you are resistant to learning the proper way to do something, because doing so implies that you didn't do it correctly in the first place, then you will have a very hard time in your nursing career.
Many, MANY things change. There is an evolving thing called evidence based practice. That means, many things I learned how to do will change because we are learning the best way to do them.
This is called Best Practice, and what we all strive to do.
So, what I'm getting at is, you better be ready to accept that you don't do everything perfectly, and be ready to adapt to change.
Otherwise, you'll come off as the bitter CNA who hates nursing students and treats new grads poorly.