Actually I can think of ways. Compromisability is more of a scale than a binary. Most people won't fight over most issues, and a group is like an average of it's members. So, if enough people are "on the fense" about an issue, you could compromise a whole group by granting them money, or some other concession. Then, that money has bought the efforts of the whole group, instead of only the ones who would've helped you anyways. Pretty devious.... powerful.

Since I think you're talking about Core, I'll add that I don't think its only a matter of compromising people. Such huge changes, potentially over the whole network and radically changing how bitcoin is used, shouldn't be possible for one implementation. For that reason alone, it strengthens bitcoin to move away from Core.