True, although I'm going to disagree with the premise that they were smart not to acquire Washburn.
Washburn is a lefty, which should help in Yankee stadium. But, more importantly, the drawbacks to Washburn do not outweigh the positives that he would bring, if you consider the Yankees situation. The fifth starter is Sergio Mitre, and they do not have a solution in AAA or coming off the DL. The fourth starter is Joba Chamberlain, and considering he appears to be coming up on an innings limit, his status is uncertain.
Obviously I don't really know what the Mariners were asking for, or what ownership was willing to do in terms of taking on salary. However, in theory, bringing Washburn aboard makes sense in my opinion.