It's very situational, but every single pilot I've ever met who beats the "I will never extend under any circumstances" drum is always a special kind of stupid.

Had a bunkie once, watching the clock for block CCO during taxi, slowing everything he could from his seat. Captain asked for a "line up and wait" while we were awaiting IFR release - we took the runway with less than a minute to spare. Bunkie was so ****ed. Such a clown, that guy, and those like him. I like to imagine him to this day, still in his mom's basement, posting to APC about all the imaginary grievances he has with the company.