The gist is correct. The commenter's post is generally ok, but with glaring mistakes that could have been corrected by simply cross-referencing themselves, it loses credibility, and it gives OP and other readers just as many misconceptions as answers.

This is a problem with most top-level comments on ELI5, and on reddit Q&As generally. Check your facts before posting, even if you think you know the answer. If you make it a habit to provide links to sources, that will force you to cross-check each time just from scanning an abstract, and it will also make your answers much more useful.