If you define “what your software is” so precisely that it must be running on iOS to count as your software, then sure, by definition your software can’t exist on Google Play. But that’s just as ludicrous as manufacturing shirts and defining “what your product is” as “shirts being sold at Walmart,” then complaining that you cannot by definition sell your shirts at Target because they would no longer be your shirts.

I mean, it's not unreasonable to say that "my software" = My binary that is running on a device.

With android, I can have an .apk that is distributed via the play store or I can have that exact same .apk distributed via any other store that exists for that device.

That's a very odd reply. Software are always targeting a platform. Tshirts aren't targeting a specific store.