The idea that every website or web app was being built by skilled artisans dedicated to the finer arts of their craft before AI is not realistic. AI didn't create spaghetti code, for example.
A lot of AI work product leaves a lot to be desired, but the realistic comparison is not to the best of what existed prior. Frankly, a lot of vibe coded apps are more functional and usable than web apps I've seen built by cheap outsourcing firms based offshore.