Re: "Kirk, You Do This, You'll Never Sit in the Captain's Chair Again.
Styles was an arrogant fop, but I see no reason to believe that he'd want an esteemed fellow captain like Kirk to ruin his career. I took it as a genuine attempt to defuse the situation before Kirk crossed the point of no return where he'd have no way to salvage his career.
From an out-of-universe standpoint, it served to punctuate Kirk's crowning moment of awesome a second later when he ordered warp speed without hesitation, and to clearly mark what was at stake and how far Kirk was willing to go for his friend.
'First Contact' is the tale of a man who just wants to cash in on his creation so he can get wasted on an island full of naked women, but his fans keep insisting that he's a saintly visionary who has profoundly altered the world. AKA - 'I Don't Want to be a Statue: The Gene Roddenberry Story.'