Warm indicates softer high treble frequencies and more harmonics in the midrange. Laid back also indicates less treble frequencies. That doesn't sound natural to me.
Warm and laid back are on the opposite end of the spectrum from bright and aggressive. Natural is in the middle of the spectrum, not at one of the ends.
I mean, you can interpret it any way you like, but such different interpretations will lead to there being incorrect assumptions when communicating with other people about speakers. And I'm not saying my interpretation is right, I don't know, but they can't both be right.