This is necessary because the wallets contain an identity proofing functionality called PID(Person Identification Data). Showing these credentials basically approves you are you. There are high requirements for identity proofing that even pre-date wallets and that makes sense, because the potentially blast radius of identity theft is huge. Historically, these have been secured in smartcards, like eID cards or passports and are not shifting to the smartphone. Verifying the security posture of your device and app is therefore crucial.

What do you mean "shifting to smartphone"? It's not a natural process - it's a technical decision to shift them to the smartphone, and a really bad one. We already have smart cards, they work and do not depend on any corporations, even less foreign corporations.

OK, but Google will happily confirm android device running Oreo is safe.

While it's dramatically worse than devices Google refuses to certify (ie these not running their spyware as privileged services).