No. The post is saying "HTML is too complex". The comment is saying "No, it's actually no more complex than anything else you already understand, it's just that you don't understand it yet".
In my reading, the post is saying that the "HTML/CSS required is needlessly complex if you look at how simple things you want as an end result".
A very different claim.
You might understand the code but you might not understand how it was reached from the requirements. There's a bit too much obscure and mystical stuff.
Well designed systems require you to know the basics and you can behave logically from there on so that you can deduce by yourself how things can be made to work.
Relative positioning and divs or styles inside other divs/styles, text linebreaks and all that has no real dependable logic in CSS, at least didn't a few years ago when I last tried doing it by hand. It required a huge amount of trial and error.
