literally the same "scam ad - scam app" pipeline exists on ios. ads exist, bad scammy ads exist, garbage apps exist, stuff slips through app moderation filters, or just stays around and gets by because it's juuust enough for it to not be outright malware. bad ads and apps are unfortunately not a platform specific problem, nor are they really "solved" by either of platforms.
funnily enough, some bits of it might be worse because ios and app store are promoted as 'being secure' period, almost unequivocally - so it ends up being a thing like 'well, ios is secure and this app is on the store, so it's all good, right?", which doesn't always happen to be the case.
I still think there ought to be some solution that includes both "apps can't force/trick you into changing defaults" and "owner of device can still choose to change defaults".
funnily enough, some bits of it might be worse because ios and app store are promoted as 'being secure' period, almost unequivocally - so it ends up being a thing like 'well, ios is secure and this app is on the store, so it's all good, right?", which doesn't always happen to be the case.