The "only because" relates to why they don't fight the regulators. As in "why fight them when you can have a revolving door agreement where they get cushy jobs

The "only because" relates to why they don't fight the regulators. As in "why fight them when you can have a revolving door agreement where they get cushy jobs in your company after they leave the FDA". In other words, I am not implying that there aren't other reasons for collaboration with the FDA, I am implying that there isn't a culture of "fighting regulations" because there is instead a culture of manipulating regulations. This in no way implies that there isn't also good collaboration.