"Commandline is way better, 'just' memorize every important command needed to do basic things and all the switches you may ever want"
I think people in general just forget the learning cliff inherent in many things. It's like we don't want to remember or acknowledge that we once struggled with something.
Just remove these words from most prose. I essentially do this to my prose and when I'm editing others'. It basically doesn't change the meaning, and obviously improves the style and tone.
If it were obvious, you wouldn't be saying it. If you can dismiss it with "just", you're probably being too defensive.
Respect your reader. Always. These words do not convey resepct. Remove them. Your readers will love you for it, and that should be your goal.
What the article amounts to is "use language I like better in your documentation". Albeit understandable, that is wierd position to me, though, perhaps there is some science on writing techniques and language use in order to make your material less discouraging and "easier emotionally" for people (similar to the famous example of positive vs. negative feedback in learning).
However, article's argumentation and suggestions on improving the situation make me think that author does not fully realize this or fails to state the problem clearly. Issue lies with the words used and not their meaning or omitting explanations for things that are assumed to be understood by target audience.