Not if we are talking about productivity, as asked here. HTML is rather simple to learn, but can be annoying enough to write. And let's not start talking about CSS is for a beginner...
Using some flavor of markdown and convert it to html would be far more productive. There is enough software around for enabling people a fast start, and you have the option to still enhance it with html&css (probably javascript too?).
There's also file includes, template syntax like loops/if-statements, inherited templates, inline Javascript syntax, "filters" for including Markdown and other languages, and much more
These days you can probably just write whatever format you like and Claude or ChatGPT will convert it to HTML.
But I've generally seen sites using this strategy to be a lot more bloated and slow, so please be considerate of that if you can.
My point was that if you count the time spent looking for the perfect renderer, HTML is faster and easier to write than Markdown unless you're writing a book. You just added another option someone has to spend time evaluating to the pile.