Are you aware that there are people that think that even now AI can do everything you describe?
The reason crappy software has existed since...ever is because people are notoriously bad at thinking, planning and architecting systems.
When someone does a "smart decision", it often translates to the nightmare of someone else 5 or 10 years down the line. Most people shouldn't be making "smart decisions"; they should be making boring decisions, as most software is actually a glorified crud. There are exceptions, obviously, but don't think you're special - your code also sucks and your design is crap :) the goal is often to be less sucky and less crappier than one would expect; in the end, its all ones and zeros, and the fancy abstractions exist to dumb down the ones and zeros to concepts humans can grasp.
A machine can and will, obviously, produce better results and better reasoning than an average solution designer; it can consider a multitude of options a single person seldom can; it can point out from the get-go shortcomings and domain-specific pitfalls a human wouldnt even think of in most cases.
So go ahead, try it. Feed it your design and ask about shortcomings; ask about risk management strategies; ask about refactoring and maintenance strategies; you'd probably be surprised.
> So go ahead, try it. Feed it your design and ask about shortcomings; ask about risk management strategies; ask about refactoring and maintenance strategies; you'd probably be surprised.
Answers to this and other kinds of questions are in my opinion just a watered down version of actual thinking currently. Interesting but still too simple and not that actionable. What I mainly use LLMs for is exploring the space of solutions, that I will then investigate if there is something promising (mainly deep research of topics or possible half broken/random solutions to problems). I'm not really interested in an actual answer most of the time but more avenues for investigation that I didn't consider. Anyway, I'm not saying that AI is useless right now.