I know people with that same mentality – they don’t want to be told what to do or think. That’s why I suggested getting them to consider the feelings of others. If that crosses their mind at all, they may re-evaluate, and that could make the difference between blind ambition and proceeding thoughtfully.
It’s the stubbornness personality trait where every decision made in life is the right one, even if in reality it’s a poor choice. They play the “watch your own bobber” and “my freedoms” card to mask this defect. No one is telling you what to do, it’s just advice on making a rationale decision…one human being (gasp) caring and looking out for another.