The argument Socrates is making is specifically that writing isn't a substitute for thinking, but it will be used as such. People will read things "without instruction" and claim to understand those things, even if they do not. This is a trade-off of writing. And the same thing is happening with LLMs in a widespread manner throughout society: people are having ChatGPT generate essays, exams, legal briefs and filings, analyses, etc., and submitting them as their own work. And many of these people don't understand what they have generated.

Writing's invention is presented as an "elixir of memory", but it doesn't transfer memory and understanding directly - the reader must still think to understand and internalize information. Socrates renames it an "elixir of reminding", that writing only tells readers what other people have thought or said. It can facilitate understanding, but it can also enable people to take shortcuts around thinking.

I feel that this is an apt comparison, for example, for someone who has only ever vibe-coded to an experienced software engineer. The skill of reading (in Socrates's argument) is not equivalent to the skill of understanding what is read. Which is why, I presume, the GP posted it in response to a comment regarding fear of skill atrophy - they are practicing code generation but are spending less time thinking about what all of the produced code is doing.