Why do images of Jesus portray him with long hair?

This question was inspired by this quip. However, because I am wondering it as a serious question, I’m putting it in the main section. Please, please don’t turn it into a bash-everyone thread.

Almost every image of Jesus I’ve ever seen looks something like this or this – a man with long hair. (I understand that as a Semite, he ought not look Caucasian either, but that’s not what I’m talking about here.)

However, in 1 Corinthians 11:14, we read, “Doth not even nature itself teach you, that, if a man have long hair, it is a shame unto him?”

I am wondering why Christian artists would portray Jesus in a way that their fellows would see as shameful. One of my thoughts was that in the absence of an officially sanctioned Divine Feminine, Jesus was “softened up” a bit (much like what happened to Buddha statues in some countries). However, Catholic images of Jesus have long hair too, despite their adding Mary to balance the ticket.

It would be easy to say something like, “Well, not all Christians read their Bible,” or to say something about hypocrisy, but that’s not what I’m looking for. Thanks!