you can always reject their request and continue with your planned approach. Yes, you may touchdown a bit later but I don't suffer from "getthereitus".
You say you'd rather take extra track miles than use speed brake - then you must have miscalculated your profile - but refuse to admit it.
Do not question my aviation knowledge or experience either. I've been flying since I was 15 years old.
I suggest you ask for your money back for the CRM course you did.
If you are 40, that makes only 25 year experiences - many of us have far more. I still make mistakes but I'm still adding to my knowledge. Sounds like you've stopped learning.