We have a Martian flying machine, but we can't make it work.

It seems to depend on billions of tiny electronic circuits. We can't even see them, let alone work out what they do! It's like studying the human brain, it might be a hundred years before we can duplicate what it does.

Should we instead create a giant gun to shoot at Mars? Or take a bit longer and try to learn more about space flight first? Or do something else?