Yes? Quite a bit of time was spent in math classes over the years learning to use calculators. Especially the more complicated functions of so-called graphing calculators. They're certainly not self-explanatory.
What does it say about your skill or the depth of this tool that you haven't gotten better at using it after 2 years of practice?
The article come across as "AI can not fail, it can only be failed" argument.
Quick, without looking it up, can you tell me what the {mc, m+, m-, mr} buttons do? If you're asking "the what buttons?" or "that's not on my calculator" then we have an answer. If you do know these, did you just intuit them or did you learn them from some instruction? If you really did intuit them, do you really think that's how most people do it? (did you actually intuit them...)