Every organic visit starts with a machine reading your website. A crawler has to find the URL, fetch it without error, render whatever JavaScript stands between it and the content, extract meaning, decide the page is not a duplicate, and store it. Only then can ranking or AI retrieval happen at all.
Technical SEO is the work of making each of those steps reliable. Crawlability, indexation, architecture, internal linking, canonicalization, structured data, performance, rendering, mobile usability, accessibility, redirects, and response codes are not separate services. They are components of one engineering discipline.
AI systems benefit from the same clarity. A page that renders reliably, exposes clean structure, and declares its relationships explicitly is easier for a language model to retrieve and interpret, just as it is easier for a crawler to index. The technical investment serves both.