(I think) They're not saying FLAC is pointless, just that 32 bit audio is. Even music producers record and export at 24bit, 32/64bit is only used for the effects and mixing (because compounding quantization noise and rounding errors is very real).
You can't find 32 bit PCM music anywhere, even hifi DVD audio is 24bit/96khz.
You can't find 32 bit PCM music anywhere, even hifi DVD audio is 24bit/96khz.