Its probably more of a coincidence, but you’re not seeing much of a covid presence in the teams that have an open window to win right now. The Yankees had 3 cases, but those were from before they opened Summer Camp. The Dodgers I dont believe have had any active cases. Twins, Astros, Braves as well. I know the Yankees are taking it very seriously and none of their main roster players seem like they’re going to opt out.
I think the fact that the NBA had issues when players left the bubble leads to the obvious that without some sort of bubble, you are going to run into major issues.