I understand what he's getting at and see where he's coming from.
If you look at the FR you see that they have fairly smooth extension into the bass frequencies with the peak ~70Hz declining below that and from there up to ~500 Hz. The extension works well with the suggested genre of music. But nowhere do the bass frequencies exceed/meet the rest of the response.
For rock you want a solid bass between ~70-300Hz and omitting floor bounce, this portion of the band is going to be louder, typically by several dB, than the remainder of the response.