No, because I am not stupid, not stubborn, not fixed in my ideas, and I care about what my voters want, which is, a say, which I can't say if I a) don't make it to Parliment, or b) am so neutered whilst I am there, either in opposition, or as a completely powerless silent parter in a coalition.
Everything you say completely contradicts this. It astounds me that you cannot see that.
My understanding of the Green position, which admittedly may not be correct (I don't presume to speak for them), is that they rule out talking to National because they are diametrically opposed to some fundamental National policies and ideas. What is the point of negotiating with someone when there is nothing to negotiate about? This is the point you don't seem to get.