Diversity happens.

Sex sells. Presenting the global maritime as universally profane/toxic is one of the oldest pop tropes in the book. Older than books even. It was W.B. Whall's central marketing theme... the 'spicy' ones they never told you about &c &c.

fwiw: If one does the hard maths on anchor cable fathoms/chorus... methinks somewhere along about verse eleventy-seventeen Shenandoah and Spanish Ladies and all the rest reverted to fiddle-dee-eye-dee-dum-dee-OH! until the chantyman could think up something better. It'll do for work song.

Pop chanties need to keep it somewhere around 2-3 minutes or risk losing audience.