The most common reason people quit is because they’re loosing. So why make someome get put into a game they had no chance to participate in before the team they get put on starts loosing? It’s honestly like a punishment. I barely ever get put in actual games anymore. I just quit the in progress ones because there’s no point when your team is getting crushed.
I hear that setting the search preference to Expanded pretty much guarantees that you will not get a JIP game. I’m not sure how it affects the quality of those matches.