I'm trying to command respect from my parents by leveraging their love for me
They should be loving you unconditionally already. Don't you think this is manipulative to others?
Yes, but I fear they wouldn't give me what I want from them
This does sound like you are being manipulative with people. You should not make your parents feel obligated to love you because you have done things for them.
It is what I need to do to ensure that my parents will be there for me. My parents care the most about their happiness not mine.
How do you know that for sure, I think you should ask them how they really feel about you. I'm sure they love you very much even though they don't tell you. I think it's wise to not try to get into this manipulation, because your parents deserve better than that.