Do most people waive the right to see the letters of recommendation submitted by referees?

I waived all of mine for several reasons:

1. I didn't want to seem rude, etc. to my recommenders;
2. I didn't want to seem like I had anything to hide (from the perspective of the LLM programs - I doubt this consideration is of any consequence);
3. I had previously seen most of my letters anyways (obviously this won't apply to everyone).

SURE, it is important to show that you are sure about your recommendations, I do not think that you will ask for a letter to someone that would something wrong about you.
You should waive the rigth to see your letter.

Thanks. I agree.