this is false, they are modern and auditable codebases, and the commits well organized and self-explicable. 
All is open, accessible and understandable for everyone.

The point is that they follow a not so common dev practicing that could let new people on codebase a bit disoriented, but it doesnt impact the possibility of read the code and audit it by any means. 

Every codebase is different as it could fulfill different porpouses, so this drama is totally nonsense.