That is the genaral belief, yes. But Mafia history is riddled with false information and wrong assumptions. It only takes a quick glance at MafiaWiki to see that most of the info presented there is without merit. If anybody brought over zips, it was Gambino while he was alive. Galante was in prison when, for example, Bonventre and Baldo Amato, by the looks of it, voluntarily came over. There is simply no proof, regardless of what MafiaWiki says, that Galante organized the transfer of these guys. These two guys were both Castellammaresi and Bonventre had family as former Bonanno members, possibly Amato too. So naturally they were drawn to and later ended up with Galante. On here, use the search function, I´ve posted a report where Luigi Ronsisvalle´s testimony can be read. He says that some Siclians, from the Castellammaresi region, were brought over in the mid 1960s to fight in the "Bananas war", against Joe Bonanno. And that these guys were brought over by Giuseppe Buccelato. If you are familiar with the Bonanno/Bonventre/Magaddino-Buccelato family feud of the early 1900s, you will see that Ronsisvalle´s testimony makes sense.

Most of the Families were engaged in drug trafficking. See for example my thread, on some of the major drug trials of the 1960s, posted some time ago. They all had established heroin pipelines that certainly lasted way into the 1970s. The myth of Galante being the one who had all these pipelines tied up in his name is an urban legend that needs to be buried once and for all. He did not control the Lucchese´s drug trafficking operations. He did not control the Gambino´s drug trafficking operations and he did not control the Genovese´s drug trafficking operations. Believing that Galante was the drug lord and contolled all these Familiies drug pipe lines is ridiculous. Therefore the claim "that Galante didn´t want to share drug profits with other bosses" is totally groundless. If Galante was murdered over drugs, it´s more likely that the reason was because he held factions within the Bonannos back, hindering them from engaging in drug trafficking and not because he wasn´t willing to share drug profits with other bosses. As I´ve said before, it was, in some sense, his murder that paved the way for the zip´s heavy involvement with the heroin trade. Read up on the Pizza Connection case which is described as the biggest heroin operation the Mafia was involved with ever, at least up til that date.