That’s a huge amount of messing around to get those handful of songs then. If only 1% are good, you’re pulling the lever 100x more than you should need to.

Putting commentary about AI media aside:

How many iterations (arrangements and recordings) do you think a typical Billboard pop song goes through before it's ready for a final mix and mastering?

Go find a YouTube of someone doing this work, it is kind of mind blowing. Given how expensive studio time is, you realize why it costs so much for a popular artist to produce a polished album.