The honest answer is no, and the useful answer is that the question is slightly wrong.
Assistants are becoming another front door: a place where the first question gets asked and the shortlist gets formed. The website remains where people land, verify, and buy. What changes is who controls the first impression.
Left alone, an assistant answers about your organisation from whatever it scraped, summarised through its own judgement. Connected to your content, it answers with pages assembled from what you actually published, and sends people to your site with working links.
One library of content serves both. The strategic decision is not website versus assistant. It is whether the version of you that appears in either place is the version you wrote.
This is one atom from the Spectare content library. Spectare assembles the right atoms for each visitor in real time, based on who they are and how they arrived.