Whenever I read these types of statements, I can't help but think that the person's bad buddy experiences are largely self inflicted. And these self inflicted bad experiences lead one to flawed conclusions.
If we were to draw an analogy to cars... lets say that you only ever bought and drove ill maintained and poorly treated used cars. You might walk away with the impression that all cars suck. You might say that you prefer to walk or ride a bicycle since you have never had any times where walking or your bicycle almost led you to disaster (brakes failing, car breaking down far from civilization, etc.)
On the other hand, some people choose to drive only well maintained and cared for cars. Regular oil changes and so on.
Another scubaboard member has a signature line that states, "If you have a bad dive buddy, it's not your buddy's fault." Those words are very true.
Well, this could be quite true-perhaps that is why I prefer to Solo dive. I do maintain my cars and bikes but, maybe, not dive buddies, In one case, a diver ripping my reg from my mouth-that was a diver I had been diving with about 150+ times, a USMC officer, very well fit, ran out of air while looking for a final legal ab off Pt. Loma. He just lost it and went on to my reg like his Mothers Teat. I made a free ascent. We stayed friends, maybe that was my bad choice. On another occasion an engineer with a major SCUBA company was testing a new 1st stage at about 120-140 FSW off Grand Cayman, his test reg failed, he came and sat on my head, taking my primary-one of his companies regs, by the way-I went to my secondary, an old Poseidon Cyklon 300, we got it all sorted out and made it to the surface. No real harm done. We had a nice dinner that evening.
Again I agree with your quote; "If you have a bad dive buddy, it's not your buddy's fault." That is the primary reason I prefer solo.