The point of bringing up Bitkeeper is as much because why use a word divorced from its original meaning at all? "master" wasn't an explicit choice by a git maintainer, it was inherited noise. When confronted with where that choice came from, in finding it wasn't a choice but a bad legacy, the git maintainers generally agreed it might be nice to pick something that made more sense as a choice (rather than bullshit noise from a practically dead and gone upstream project) and after much debate "main" made sense as something a lot of people were using anyway.

That's what is "special" about it, that it wasn't special. It wasn't chosen. It was just a stupid inherited default that didn't make sense when questioned.

It was never an intentional allusion to a negative thing, it was accidentally a negative thing causing real people some harm, and it was easier to fix than to justify why it was a negative thing in the first place.