Templates look finished in a demo, but they ship with features you will never use. Every unused slider, layout and bundled plugin adds code your visitors have to download, which slows the site and makes Core Web Vitals harder to pass.
Custom WordPress development starts from your content instead. You get only the code your pages need, which keeps the site fast and reduces the number of plugins that need updates and security patches. Editing is simpler too: your team works with blocks and fields built for your pages, not a maze of theme options.
A custom build also gives you a clean SEO structure, with one H1 per page, logical headings and proper markup, and full ownership of a theme that isn’t tied to a template vendor’s license or update schedule.