Totally with you. If your best reliever is ready to go, absolutely use him against the top of the order of the league's current best offense while playing in their clown park.
Osuna got rocked (luckily not rocked enough), but I still defend the move. If it were 5-2 going into the ninth we wouldn't even be having this discussion because it would be the "right move". Stat managing is the scourge of winning baseball games.
If anything was crazy, it was bringing in Estrada to face that lineup again. Everything in the 7th was stung. And while I can't really fault Gibby for letting Estrada have his shot at the no-hitter, the homer in the 8th wasn't much of a shock. Bringing him out for the 9th seemed destined to fail.
Gibby seems comfortable with avoiding the bullpen as much as possible. That's all right, I guess, as long as his starts are effective and efficient. But I think he tends to go a step too far and allows his guys to get themselves into a bit too much trouble before bringing out the fire extinguisher.