The fundamental mistake most "entrepreneurs" (and more than a few programmers) make is thinking that the programming (although tricky) is the hard part. It's not. There's a reason there are massive multinational companies that do nothing but provide support services for 𝘴𝘰𝘮𝘦𝘰𝘯𝘦 𝘦𝘭𝘴𝘦'𝘴 𝘴𝘰𝘧𝘵𝘸𝘢𝘳𝘦.
Vibe coded software is free as in puppy not free as in beer. Even if writing code is now cheap, you still have to maintain it.