Aesthetically pleasing to the artist.They can do whatever they want to tell a story is the logic of some fans today.
Arguably, backswept pylons is just an illogical visual change for the sake of change.
If doing such a character change to Sybok tells a greater story to speak to real world topics, then it's a worthy change (if successful). What does backswept pylons do?
These are not anywhere close to the same idea. This is apples and asteroids level comparison.