Doesn't sound like it's Nintendo being "too dumb". The demand is just much, much higher here than in our territories. Combined with the fact the port strike caused massive delays.
I guess "dumb" isn't the right word. More like their supply chain and manufacturing are not as responsive to sudden changes in their forecast demand.
And the port strike should be a non-issue at this point. If they mishandle wave 4, then they have no excuse.