It can create a branch with -b, based on a branch of your choice (not necessarily current).

I constantly use this, having created an alias:

  [some other branch]$ git cob feature/foo123 main

Eh, I can squint and see that as a special-case of moving your head to another ref - the `-b` merely flagging "if this branch doesn't exist, create it instead of erroring".

It's a bit like building a train station is a special case of arriving to it :)

maybe like mkdir + chdir

It's arriving at it with trucks and bulldozers and other equipment repeatedly, but essentially yes.