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> There are many things for which the evolutionary cause is not obvious to us, but it doesn't make sense that there would just be lots of random truly superfluous aspects to us.

Sure it does. Look at our appendix. Look at all the diseases out there--almost every person has at least one almost-certainly non-advantageous yet obvious ailment. One can speculate that it would be advantageous in scenario A or situation B, but that's all it is, is speculation. Maybe something we have now was advantageous 5000 years ago, but we don't necessarily know why, nor is it useful to describe modern behavior in such terms.