this isn’t a contact tracing problem, and painting it as one does a huge disservice to the privacy engineering that went into getting that protocol built and deployed
The article is definitely highly inaccurate and misleading.
System apps are still sandboxed and constrained by the permission model. They don't have full access to system internals. Some (not all) system apps are priv-apps and can use privileged permissions whitelisted for them.
OEMs can of course modify the standard AOSP system apps and add whatever else they want. Those apps can only get privileged permissions if they install them as a priv-app and can only get the ones they whitelist though. It matters because they aren't all their first party apps.
A normal system app is simply a bundled app. It doesn't get additional privileges from being bundled.
So, for example, if they bundle say, Facebook, it can't obtain the logs. They'd have to install it as a priv-app and explicitly add it to the whitelist for this permission too.