Yes but
1. It's the most popular client on Android
2. Users don't even know it's happening
Discussion
And what did I say?
It IS Nostr to many though.
Correct, and every user chooses their own experience, whether through ignorance, apathy, or insecurity, the user is the only one to blame for their own filters. This situation is far better than any alternative short of users running their own web spiders.