That's most of the project I've seen people post about at least. Either actual clones of simple games, or just dreams of saying to AI "Make me red dead redemption but with pirates!" and expecting something playable.
If you spend enough time with AI you likely could come up with a great game. It'd probably take longer to explain to AI what you want, correct what it gave you, explain how you want to teak it, then correct that, etc. than it would just to code it yourself (for those who can code) and as the project grows there's a risk of it becoming unmanageable unless you have AI hyper-compartmentalize everything to fit each function within the limit of what it can keep track of, but that's going to have impacts on performance and maintainability too.
It may not be the most efficient way to do it, but as long as you put in enough time and effort on design, are willing to spend the time forcing the AI to get it right, and don't settle for less than what you envision, it could work.