You are looking for a "secret to making money" which, even if it did exist, would be extremely foolish for anyone to share. If an earning opportunity of the kind you describe does exist, then it would rapidly diminish to zero when everyone else jumps on it if it's published publicly. I assume that someone has worked very hard, tested many variations and spent a lot of money if they did discover such a strategy, so what makes you think they would dump it here? In truth, there will be a very small minority of people who are able to beat bookmakers (at least for a short time) but the vast majority will be losers. Bookmakers are in business to make money too, and that comes from offering odds that make them a profit.

You ask for logic.. this is the hard reality.