There’s nothing wrong with using an AVR for Pure 2CH music.
As
@PENG has shown with FR graphs, the Denon X3400 7.1 AVR measures at least as well as a separate Stereo Preamp for 2CH.
I’ve compared AVR with other high-end analog stereo preamps. For some people who don’t care for all the audio theories, religions, and SNR of 130dB and just want simple 2CH music, an AVR will do just fine. It may not be for everyone, but it is just fine for many.