What you are missing is that the thing driving this untrusted pile of hacks keep getting better at a rapid pace.
So much that the quality of the output is passable now, mimicking man-years of software engineering in a matter of hours.
If you don’t believe me, pick a project that you have always wanted to build from scratch and let cursor/claude code have a go at it. You get to make the key decisions, but the quality of work is pretty good now, so much that you don’t really have to double check much.