A quartz crystal filter is superior to an LC filter for narrow bandpass applications because of the:

The "Q" or Quality factor of a resonant circuit determines how sharp or narrow its bandwidth can be. Quartz crystals possess a naturally high Q, often in the tens of thousands, which allows them to create incredibly narrow, steep-skirted bandpass filters. This characteristic makes crystal filters far superior to standard LC (inductor-capacitor) filters for narrow bandpass applications, as standard LC components have much lower Q values and therefore produce broader resonance curves. Options claiming crystals have a low Q or LC circuits have a higher Q are factually incorrect.