No offence, but this doesn't actually explain anything. You use a lot of words to say "stars don't fuse iron because they can't".

You even have to throw away your analogy at the end, because it doesn't make sense.

I don't understand why people think ELI5 means they should anthropomorphise stuff. Sometimes that's useful, but sometimes (like now), it just serves to cover the fact that you didn't explain anything. "I don't actually know, little Timmy, but here's a nice story to occupy your mind, so you don't have time to ask any more questions."