The problem is that everyone has a different opinion. If you let a single user drive the design then that single user might love it, but everyone else will hate it.

Bespoke designs are often really terrible. Have you ever shopped for a house?

You know immediately when the previous owner had their stupid whims indulged by contractors with dollar-signs in their eyes. The house is ugly, non-functional and is not going to get the sellers price.

The next owner will undo nearly all of the work, and the contractor will cash in on both ends.

As engineers, we like to think we're the contractor in this scenario. But it's actually just an LLM.