Never said you were wrong. Apparently I missed all Amare's great 18-foot jumpers you saw in 2005. I believe that a team with well-balanced scoring across the board is harder to defend than a one-man show. You don't.
There is a tendency to overrate the ability to score with a few seconds on the clock against really tight defense. Yes it's very nice to have, but great one on one players are a mixed blessing because they think they can score every time they have the ball - even when a teammate is open.
What makes Nash so dangerous at crunch time is that he gives the team so many options: pass, drive the basket, pick and roll, pull up jumper, fall away, and still hit 90% of his fouls shots.