This will promote a flood of apps exploring real-money gambling on all platforms. Google and Apple are probably worried on the due diligence on this kind of games, if the odds are respected, if there is no possibility of rigged games, etc etc
We actually take this very seriously at Betable. We do due diligence on all games that go live with our platform. There are two reasons: the legal reasons, and because the long-term health of our ecosystem depends on it. If players get ripped off, they won't come back. We're going to make sure every game is legal, fair and fun for those reasons.
I am not sure how deeply you can go into your vetting process publicly, but I'd love to know how you can prevent a shadier company from pulling a bait-and-switch to change the odds of their games after you've approved them as a trusted vendor.