And then they get bored and just go full bore ¿ conjunctivitis applique to unbound ¤ variable 》》-> is a Mongolian {....} ... forgetting they were in tutorial mode. Or, showing examples which embed syntax which is apparently the same as before but "oh shit, I forgot a : means something else in this context" so having explained syntactically what a : means.. confusing you again.
Or showing REPL prompts without explaining if the # is a prompt or part of the command. The list is frankly endless.
Decades ago, this was C programmers trying to explain basic imperative syntax and then using a "compute prime" with a recursive function call or a ternary operator or bitshift.
So my next blog maybe will be "seven cardinal sins of blogs about basics" which will have only one sin: forgetting the job, the only one job you had (or apparently set yourself)