I think the main problem lies within peoples' attitudes towards HTML and CSS.
They're still two out of three of the primary building blocks for the web. They're still necessarily tools in your toolkit and being good at building well-designed websites and applications are important skills in front-end (or full-stack) development.
I don't think it really matters whether they're programming languages or not. I personally don't consider them as such, but think it more pragmatic to remind naysayers and gatekeepers of their importance.
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