I just mentioned it because I think it's an interesting topic. Personally, I believe in a God that is all loving. But don't you think that if we do eventually fill in those gaps, there will be nothing else for us to strive for? I believe that the gaps in our knowledge and understanding are what make us human and should humble us. I do hope that there will always, regardless of technological or scientific advances, be gaps that we will never quite understand.
I agree that things would get pretty boring if all gaps were filled and everything was known. My point was that your theory on dark matter is no different than any others throughout history that have attributed unknown phenomena to divine intervention.
And I'd say all of those should at least be pondered as possible signs of something greater.