If you have Android Oreo/8.x, most (all?) google apps (including Maps) allow you quite fine grained control over notification categories (so you can choose to have traffic updates and nothing else, if you wish)
Notification categories is not exclusive to google apps, of course (OS level feature as long as your app targets Oreo), but their apps tend to give you very good control over what it shows you.
So, I'd disagree strongly that this is a google "strategy". It's more a problem that their apps tend to have a lot of features crammed in.
Of course, I don't know how this works on iOS (I'd be surprised if it's not in the settings somewhere? It's in their interest that you don't disable all app notifications)
Notification categories is not exclusive to google apps, of course (OS level feature as long as your app targets Oreo), but their apps tend to give you very good control over what it shows you.
So, I'd disagree strongly that this is a google "strategy". It's more a problem that their apps tend to have a lot of features crammed in.
Of course, I don't know how this works on iOS (I'd be surprised if it's not in the settings somewhere? It's in their interest that you don't disable all app notifications)