I agree its a necessary but not sufficient condition. I think phrase 'sucking up' seems to have triggered people. I should've said 'building trust and camaraderie' with my superiors, aka being one of the 'bros' in their inner circle .
I believe from your response that you perceived 'sucking up' as negative for some reason. Curious about why you instinctively reacted that way. whats wrong with sucking up?