I've not written a site from scratch in a few years (3 or 4) until recently, CSS has got a lot more complex (and yet also slightly easier as most of the core is the same across 98% of in-use browsers).
I hadn't done flexbox or css grid, didn't know what rem was, hadn't used calc(), or media queries that target based on viewport size.
Just spin-up a Wordpress instance sounds easy but most people will need/want a few plugins and things start getting complicated fast.
Before long you're handling passing special headers by modifying .htaccess and looking at Leaflet.js source code ... just to stick up a simple WordPress site.
And you still missed a million 'basics' like resizing media appropriately and adding aria-labels, and your site is not SEO friendly, and you didn't handle backups yet, ...
None of what you're saying is more than point and click in WordPress. No one you're describing is doing anything as complicated as you're describing because they don't know to even ask for it. They are going to be perfectly happy with what they are offered stock. Paying someone to host your site means things like site builders with auto resize and point and click interfaces exist. It's like half my comment was ignored.
I hadn't done flexbox or css grid, didn't know what rem was, hadn't used calc(), or media queries that target based on viewport size.
Just spin-up a Wordpress instance sounds easy but most people will need/want a few plugins and things start getting complicated fast.
Before long you're handling passing special headers by modifying .htaccess and looking at Leaflet.js source code ... just to stick up a simple WordPress site.
And you still missed a million 'basics' like resizing media appropriately and adding aria-labels, and your site is not SEO friendly, and you didn't handle backups yet, ...