Shadorne, the real question is how many recording engineers use the same equipment in their personal systems.
Tbg,
Some do use the same speakers at home - of course many may not feel the need given what they have all day at work - why even bother to compete with a pro setup....why take your work home. However, some artists/engineers do buy speakers after encountering them in high end studios...not that like you or me they won't have five or ten other pairs of ordinary consumer speakers at home....they will. Of course domestic requirements may mean that they do not put ugly behemoths at home in a small room or the kitchen or the patio....but I hope you get the idea.
The needs of a recording studio are different from those used for entertainment.
I agree, home playback does not require the same in terms of electronics (no mixer/compressors/limiters and all manner of expensive tube and analog processors and no need for hundreds of mics etc.) I also agree that studio near-field monitors with narrow dispersion that are used for mixing are ill-suited to the home where you want good sound in a wide area with a lively reverberant soundfield rather than a vice-grip position for your head and having the sound beamed at you (clinical sound).
However, I believe that a good speaker is important to both home and studio. The studio "main monitors" are generally the ones that are designed to be the most "impressive" - this is what the artsists hear themselves on. These are designed to make the artists/conductor pleased about the decision to use the studio....they are the usually the best quality speakers in a studio that is cluttered with many smaller two way near-fields (so guest engineers can use whatever near-field they prefer to mix on).