The idea is the opposite - "nobody" can make money selling software anymore, because software can be cheaply created by an LLM, so you want to start a business that previously would have had to buy software/software engineers in order to support some other product.

However, even if that holds true (which is a big if - right now I wouldn't want to run a business backed by vibe software), and even if there are enough such business ideas to go around, there's going to be quite a lot of turmoil in the meantime.

Gyms still make money even though you can stay quite fit with just a good set of adjustable dumbbells, a bench, and a jump rope.

  How could your "business" ever make money if any idiot with a $20 CC subscription can recreate it in a weekend? And no, "I can prompt better than them" is not a differentiator.