if you knew the next field goal beat you, and you had a chance to win in one play from the two-yard line, you will always take that option

it is *not* a better option to kick a PAT, have to make a defensive stop out of field goal range, THEN have to drive the ball again back into field goal range yourself -- and also make a field goal

so the only possible advantage of getting the third possession doesn't really exist (unless you go for two on the opening drive for some reason, that may be the galaxy brain stuff you're referring to)