The issue is that the 'B' is not very consequential.

Consider something like Shopify - someone with zero knowledge of programming can wow you with an incredible ecommerce site built through Shopify. It's probably like a 1000x efficiency improvement versus building one from scratch (or even using the popular lowcode tools of the era like Magento and Drupal). But it won't help you build Amazon.com, or even Nike.com. It won't even get you part of the way there.

And LLMs, while more general/expressive than Shopify, are inferior to Shopify at doing what Shopify does i.e. you're still better off using Shopify instead of trying to vibe-code an e-commerce website. I would say the same line of thinking extends to general software engineering.

What was described was offloading portions of software development to a LLM to reach B faster. This works very well and is an improvement over the traditional method of implementing everything yourself.

Shopify is tangential to this. I will add that having had experience with similar platforms in the past (for building websites, not e-commerce), I can say that you must be either naive or a masochist to use them. They tend to be mediocre compared to what you can get from self hosted solutions and the vendor lock-in always will be used to bite those foolish enough to use them in the end.

Or you are just not creative at all and not making anything that interesting yourself.