Google can argue that they don't have 100% of the market and they did changes with android 12+ that enables other stores to provide packages.
I would be tempted to say this is because a lot of the iOS pitch is “trust Apple because you don’t trust the regulatory environment” whereas in places like Germany the regulatory trust is higher so that pitch sounds weaker.
That said, I have heard the "trust" version of the pitch from some VC types floating around UNLV and I find their trust in Apple to be perplexing.