Volumio Spotify sample rate over HDMI

Hello everyone,

I just installed my Volumio today on a RPi Zero W that was lying around gathering dust. I came into possession of Yamaha RX-V367 amp and I needed something to be able to stream Spotify and internet radio.

And here comes my question:
99% of the time I’m gonna listen to streams with sample rate of 44.1kHz. I currently connected RPi to amp with HDMI cable, which I’ve read is not bit perfect solution, as RPi downsamples audio to 44.1kHz to send it via HDMI. However, as my stream and HDMI have the same sample rate should I even bother with getting I2S DAC? Is there anything to gain here?