Are you disagreeing with the explanation? I am curious why.
It makes sense to me.
Move slowly and deliberately while avoiding big mistakes. As opposed to moving fast and making big mistakes which by comparison is slower.
The philosophy that was not being understood was "move fast and break things." "Slow is smooth, and smooth is fast" was mentioned as an opposite point of view.
To then explain "slow and smooth, and smooth is fast" as a reply is to not comprehend the comment at all. Then, it ends with a link to their own blog.
the top level comment is fine. the lame guy's comment was a promotional chatgpt-generated useless tl;dr that added zero information and linked to his own blog post