I often find myself starting sentences with phrases like "I just want to let you know that", "I would like to ask if", "I am writing to discuss", or "I was wondering if" in emails. I could simply just let them know something or ask what I wanted to ask without these phrases.
For some reasons, it feels more polite to not directly say what I want to say.
Is there a merit to the politeness argument?
I originally asked this on english.stackexchange, but I was told that interpersonal.stackexchange is a better forum for this question.
Edit: I think the original question was not clear, so here is what I am asking:
Is it true that starting sentences with such leading phrases makes the email sound more polite?
To be more clear, I live and work in the U.S., but grew up in a different country. I cannot tell if my reluctance to write direct sentences comes from my cultural background, or it is actually more polite in the U.S. to use these phrase.