This is exactly what happens in the movie already though. The flaw Galen left on the Death Star was a leaking reactor. How to get to the reactor is a whole different matter - Luke’s miracle.
I don’t disagree with that. This was just an idea I had to address this issue, which I have heard brought up from time to time. I’ve argued against it before, but I can see where it is coming from as well. Kind of want to get a sense of people’s feelings about it.