I don't think Google is against sideloading since Android supports it by default. I think Google is against being required to allow third-party app stores to h

I don't think Google is against sideloading since Android supports it by default. I think Google is against being required to allow third-party app stores to have feature parity with its own, and against being required to allow third-party payments in apps purchased from the Play store. Those things would reduce Google's revenue.