This is a terrible argument, you can today ship a device with Android or even fork it without any consent or involment from Google or even include Google Play and you have big players on that front like Amazon and Huawei where no money what so ever goes to Google, per device or even for app store fees. By your logic what is already happening today, shouldn't happen.
Google and Apple can keep their app store fee, but otherwise they shouldn't be able to control what the users do outside their turf.