I generally agree. Though I still might make the Washington deal. Maybe.
Still, as the OP states, people around here generally forget how hard it is to build a contender. Generally speaking, most combinations of good players AREN'T good enough to win a title. Look at all the great teams of even the past 10 years that were good, but never won a title: Webber's Kings, Dirk's Mavs, Nash's Suns, and the list goes on. Thinking we can just throw some pieces together though trades and expect it to work, isn't necessarily the recipe for success. In fact, there's probably a 95% chance or better that the post Big Three Celtics won't win a championship in the next 10 years.
More importantly, I think people are forgetting that the Big Three weren't just successful because they were good, they were also successful for the following three reasons:
1) They were unselfish (mostly because of age)
2) Their games fit well together given the way all three could pass and shoot
3) They all played tough defense
Quite frankly replacement players may not fit those criteria and may not be able to make us as good as were were.
Doesn't mean that we should never make a trade, but I wouldn't make it with the levity that some people on this board would.