The meta-point is that the usage of complex words is off-putting to those trying to learn something for the first time. There's always an element of "I don't know what this is, so I can skip it" but better to keep topics simple and approachable.
Method names alone will drop you way out of the simple english, top 1k words simplification paradigm.
I prefer when I'm learning something new if it treats me like an intelligent person who is ignorant of that topic. So, yes, if you want to teach me something be gentle in the language from that subject. But please assume I do know some things.
My first real tech job was in a country and office where the working language was one I didn't speak while growing up. If I came across words at work I needed and didn't know, I looked them up or asked for clarification and learned them.
For better accuracy, maybe one needs to take out special terms first.