The whole premise is very unimaginative. It just takes one step on the infinite series and does not ask what the asymptote is (if there even is one).
If every coked up SDR can build a tech stack, then every junior SWE can get superhuman SEO.
If every product has superhuman seo and engineering, and there are 10 or 100x more products, then probably everyone uses the exact right one for their needs, and quality for your specific usecase is higher. (More competition means more quality, more of every differentiator, including lower prices. )
In a world of zero marginal cost of production (turning ideas into reality with a prompt), maybe it’s hard for anyone to eke out profit margin; I can’t see what anyone’s edge would be in this world. The end state here is much more disruptive than “dang, a coked up sdr out-competed me on my SaaS ide-“.
The edge is ownership - of GPUs, capital, connections and distribution channels (this includes SEO). Also, SEO will be meaningless if LLMs will be the main discovery channels. Much less transparent, and we are already seeing that, for example the "what about South African ***code" grok system prompt manipulation from a few months back.