You're underestimating people's stupidity.

Yes. I got called out by some random "offended" person while discussing a master slave topology on i2c bus I was working on in an embedded system with a friend. It was a coffee shop in Austin so it wasn't exactly shocking but the first time in my life so worth mentioning. Also a company I worked at once declared we should use different terms going forward in our own systems that used master/slaves topologies, they had a variety of alternatives.