Common knowledge? Please tell me where that common knowledge originates from. From guys posting on Real Deal? Ask their sources and they´ll probably say "well...it´s all over internet!"
Lilo Galante and his crew (Galante was a captain, not Bonanno´s underboss) was heavily involved with drug trafficking. I am not denying that. But if you read Bonanno and do a little research yourself, you will find that the Gambinos, Luccheses and Genoveses had a lot more people involved with drugtrafficking.
Their bosses allowed their men into that field, Bonanno did not.
Neither did Profaci.
It wasn´t until 1963 that Carlo Gambino banned drugtrafficking in his Family. This you can find in FBI documents, on the Mary Farrell Foundation site.
Another way to do a little research (actually it is a major project, but anyway...), take a look in the FBN book. And this is why I mentioned it in an earlier post in this thread. You will see the gros majority of the New York Mafia members and associates, who dealt with narcotics, where part of the Gambino, Lucchese and Genovese Families. Only a handful men, out of 800 listed in that book, was with the Bonannos and Profacis.

As to your statement of 90 percent of Bonanno´s book being fiction...I wonder where did you get that number from?
Nobody, up to date, has been able to prove Bonanno being a liar. So your 90 percent seems a way, way off.

It´s always better to do research by checking sources before believing what everybody can write on the internet.