While you are not wrong, another way of looking at that might be... If you move an old expensive guy to bring in a young guy who may or may not be any better... but you might catch lightning in a bottle, is the kind of risk that might be worthwhile for a rebuilding team. I don't remember who took their places immediately, but if it was guys who were later traded, or were young and inexpensive then it is not so bad.
If it was Markakis (who came the following year) then at least you got a good clubhouse guy who didn't kill you.