For the life of me, if that is the extent of the disclaimer, I can see how no one can disagree with it.
Evolution is a theory.
Critical thinking and careful study can't do any harm and might do a lot of good.
Sometimes, here on FR we get so involved in the ins and outs of our debates that we know exactly when one group is seeking an opening, so we set about closing it off. If a person not involved in debate were to observe what we were so furiously combatting, they would see the point at all.
That's the way it is in this case. The EV folks are so into the argument, that they've forgotten that it is "the theory of evolution."