The OTA direct fm analog signal is a superior high quality and uncompressed reception signal that is CD quality or a notch above depending on atmospheric conditions….IFF you have the quality build equipment to handle it AND proper signal reception through a proper external stand-alone fm antenna .
I’m into FM but that is simply mistaken. First, all broadcast signals are subject to some compression, if only to prevent overmodulation. Most stations go far beyond minimal processing, and fine tune things such as Orban or CRL processors to create a unique or "punchy" sound.
FM also can’t deliver CD quality because of the 19kHz stereo pilot tone that has to be filtered form the signal. Most FM tuners struggle to deliver above 15 kHz.
Don’t get me wrong - I’m among those who still appreciate fine FM sound. But, as with all formats, it has its limitations.