It's true that it's a problem, but it can be easily fixed in the future. For example they could just change the app to work on any old android fork. You still get the benefit of no longer having transaction data run through the US.

But right now many of us are concerned with not being able to run e.g. GrapheneOS without locking ourselves out of all basic digital infrastructure. We shouldn't wait until it gets untenable for the EU to lock us into Google and Apple, we want independence from the start.