This has nothing to do with keeping people safe. If it did then power users could continue to install their own software by being given that ability as a developer setting. The fact that some people are gullible enough to go into a hidden setting on their phone and enable that in order to install an app from a random Chinese website is not a good reason to take away everyone's freedom. Consolidation of power is all this is about.
It absolutely has to do with keeping people safe. You not caring isn't relevant.
This has nothing to do with keeping people safe.
...and...
some people are gullible enough to go into a hidden setting on their phone and enable that in order to install an app from a random Chinese website
are kind of contradictory.
There is immense pressure to stop online scams which are draining old people of their life savings. The whole flow from the article seems entirely based around letting power users install what they want while being able to break the flow of a scammer guiding a clueless person in to installing malware.
It is promising that Google has avoided just turning off sideloading but still put measures in place to protect people.