The common use of “With all due respect” nowadays tends to be the sarcastic version — the one that roughly translates to “You outrank me so I’m required to respect you, but you’re a pompous asshole and I hate your guts”.
This is a case of the other use — “I respect the authority that you’ve earned and demonstrably deserve, but this is my field of expertise, not yours, and this is well beyond your understanding”
This is a case of the other use — “I respect the authority that you’ve earned and demonstrably deserve, but this is my field of expertise, not yours, and this is well beyond your understanding”