Bingo.
Give that man a Kewpie doll.
Whatever the "math" might indicate long term was not as important as the actual impact they had short term when their use was instrumental in taking out the opponents Capital City, and then getting Capitulation in order to sign a Peace Treaty.
Like all things CIV, I think a person's strategy in combo with what is happening on any given turn could indicate different uses in different scenarios at different times.
I think anytime a game component becomes as cut & dried as the one poster argues, it is indicative, or even full admission, that the game is not that good or complex because it can be "solved" so easily.
It is similar to the debate over Knights vs Bishops in Chess. Sometimes one is better, sometimes the other is. So much depends on terrain, an individual's playing style, and their comfort & skills with each unit. Two good Knights can dominate even superior pieces such as two rooks in closed position, let alone the Bishop pair.
Just sayin.