If you believe a fifth bass string is about technique and not sound then you shouldn't be a musician of any sort.
Ouch! I've been frontin' for years.
You make an interesting point and the follow-up about a fretless being pretentious too or not? This is a quagmire of epic proportions!
Somehow a fretless for the tone provided is incredibly cool, but a five string for the tone provided didn't even fit in my coolness equation!... Damn! I need to go home and cry now.
BUT Rush is never cool! Sorry dorks...