That's not what they're saying at all. What they're saying is that if you're ONLY reason for changing your vote is how Obama votes for SOPA/PIPA, maybe you should rethink your priorities. While this is a big deal, there are way bigger issues on the table that have been brought up, like the fact that Gitmo is still open.
You don't have to rationalize anything to anyone but yourself. They're just recommending you think things through before making a decision on a vote such as this.