Well on the topic of non-audiophile or not, I'd say that bitrate can determine whether someone's an audiophile or not. When FLAC became all the rage in my country around 2008, I did a lot of blind tests on 128kbps AAC and MP3, 320kbps AAC, 320kpbs MP3 and FLAC ripped from a local, authentic CD to see whether there was any difference. There was none. I decided to keep on ripping my music at 128kbps, however made the switch from MP3 to AAC since the file size was smaller.
The thing is that back then I used apple headphones or cheap "ultrabass" Sony rip-off. Later on when I bought my first pair of Grados and Sennheisers (SR60i and HD448), the difference btwn low and high bitrate became clear. I moved onto 320kbps. With that setup, the difference between this and FLAC was still not audible however.
Similarly, on my friend's custom amp connected to his EMU, the difference between FLAC and MP3s is there. Blind tests and all.
IMHO the loss of bits on lossy files must account for something, and IME it does. However it's our gear that will actually do the differentiating, not our ears - provided your gear is hi-fi enough, the difference will be there. Non-audiophile people will not spend much on their headphones, so there's no point in using FLAC.