When I was at AWS, when we did postmortems on incidents we called it "root cause analysis", but it was understood by everyone that most incidents are multicausal and the actual analyses always ended up being fishbone diagrams.
Probably there are some teams which don't do this and really do treat RCA as trying to find a sole root cause, but I think a lot of "getting mad at RCA" is bikeshedding the terminology, and nothing to do with the actual practice.
Probably there are some teams which don't do this and really do treat RCA as trying to find a sole root cause, but I think a lot of "getting mad at RCA" is bikeshedding the terminology, and nothing to do with the actual practice.