This person felt like Wordpress was too complicated, despite it being a system you can use to set up a site with literally no coding at all (using Wordpress.com or one of the many hosting providers with one-click installs). You can live-swap themes to see which one you like, again with just some clicking.
Meanwhile he is hand-editing .htaccess files to get the URL structure he wants and switching from JPG to WebP (a change with no real-world SEO value) to try to help SEO.
This is not to condemn or criticize! It’s just that when people have experience with having their hands directly on software development, they may be more likely to prefer a web stack that mimics that feel. “Easier” for a coder is going to be different from “easier” for an artist with no coding experience. Look how many artists use Squarespace or Wix for example, which did not even make the list for this effort apparently.