Games have a great legacy of interoperability. Maybe at some time there was some bone hewer trying to tell you how to roll the dice he made you, but today the dotted cube from the Sorry box rolls just as well as the ones in Monopoly.
Consoles enforce standards so that peripherals work with every game. PCs are a little more loosey-goosey, but I'd say games do more to enforce interoperability than make it challenging. Tabletop games don't care if you mix and match their rules so long as you don't try to repackage and sell them.
Sure there's siloing, but nothing like the walled garden that you see with other verticals. You have giant triple-A games that let anyone mod them for free. You have platform-level rewards like steam points, and xbox badges.
So why not have some open version of all of that stuff?