Ok, this article attributes it (the butthole logo trend) to the connection to crypto logos:

https://www.fastcompany.com/90869029/ai-boom-logo-trend-swirling-hexagon

Mentally replace “hexagon” with “butthole” while reading.

Going from there to their article about crypto’s “hexagonal” logos:

https://www.fastcompany.com/90756090/crypto-logos-design-hexagon-bitcoin

it suggests:

The hexagon’s current popularity probably stems from designers taking a stab at a simple literal depiction of crypto as an enterprise based in the blockchain: Rotate a cube, or block, to a three-quarter perspective, and you’re looking at a hexagon.

Anyway, I dunno, but there’s some speculation.