It's only a problem for those who think science is the only possible way of addressing questions on the true nature of ... well ... anything. Like yourself. For those of us that understand there are other methods and avenues of investigation, it's really not such a problem.
Of course it's not only possible, it's advisable. We humans learn by imagining possible explanations and the possibilities those explanation afford us, and then acting on them to see if they work. It may not gain us truth, but it does gain us some functional effectiveness that we can use to help keep us honest, at least. Your theory that an idea has to be justly valid before we can propose it is silly. We'd never learn anything if we behaved that way. Every possibility would be rejected before it was even tried.
I realize that's what you want us all to do with THIS idea, because you have decided it's not valid, but that's just your bias trying to get in everyone else's way.
And what you are suggesting is *exactly* the scientific method: propose an hypothesis and test it to see if it works. But, don't *assume* it works. Do actual testing to see when it works and when it doesn't.
Scientists propose new ideas all of the time. And then they or other scientists *test* them. It is only after they have been tested that they are accepted as being true (or useful).
Now, in what way is the hypothesis of a supernatural testable? In what way is it useful for understanding? Or is it only useful as motivation and convincing us to do what we have decided needs to be done?