I dunno. I doubt it is. But I also doubt there isn't something they are getting back.
Maybe not personal information but I'd imagine there will be data on what keywords it flagged on and whether the user hung up or carried on with the call etc. They wouldn't be able to fix or improve the service without getting information back.
Also ways to disable the call recording prompt they forced into it. They force that even in one party regions where you can record your own calls without needing permission from the other person.
The recording feature isn't available in a lot of countries, including mine. Even though it is legal to record calls without informing the other end here.
most likely they don't want to get into any legal trouble and it's like a thing they're rolling out on per country basis rather than creating a blocklist of countries where it's illegal
Rooting your phone if possible is always a nice solution to this. BCR works great for me(along with BCR GUI). I can also still use my banking and Google wallet apps (you just need the right apps/modules)