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(I know it was mostly a rhetorical question, but ...) It depends on where you are as a photographer. I'm absolutley of a mind that all people new to photography should be given a 50mm prime (or equivalent) and told to take photos with it.
But knowing that, there is an appropriate space for other lenses also. It also becomes a quality thing, when you know that a prime lens will cost 50% of a zoom lens and be significantly better in quality it is worth having the range covered that way
I've got a 56mm, 35mm, 2x23mm, 35mm, and 50-250mm lens in my camera bag. Are they all the same?