"use syntax highlighting" is really a poor defense. I'd say that code that isn't readable without syntax highlighting is just that: unreadable. One doesn't always have the luxury of using the editor that's tuned to your preferences
Can you imagine a doctor eschewing the use of a stethoscope, because one day he might encounter an emergency when he hasn't got it with him?
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.