X90J Does Having eARC On (Auto) and Pass Through Off Negatively Affect Quality?

Have a Q990D in eARC HDMI port 3 on my X90J and PS5 in 4K HDMI port 4. I have found that with Pass Through turned on when playing Blu ray discs via PS5 I experience a pressure in my ears and so have left it off. When would I experience a loss of audio and or video quality due to Pass Through being turned off?