It makes sense in my opinion. There's close to a billion combinations of hardware and software on Android, it's impossible to ensure the application runs on every single one of them, but if you can tell if it works on your device simply by reading the ratings, that's useful information.
Ratings are not just about an app functioning, it's about if it's any good or not. And by showing only reviews of a certain type, users might not see a lot of the complaints if they are from people on different hardware.
Seems like a way to limit effects of discontent in my opinion.
Let's say you have a Samsung s20 or whatever. Millions of people will have that. So if you are not complaining from that type of device AND from the same region, your reviews may not be seen at all.
This is how you make sure that bad reviews don't impact applications like reddit so much.
I'm pretty sure it's like that because if I use an app on whatever class of device (say one stuck two os versions behind) and have a bad experience because it works poorly, that's not shown to you because it might be fine on the class of device you're using