This will be contentious but I think that is good advice. Quoting Matt Christman:

Your anxiety is not secretly powering some machinery of resistance, you're just giving yourself a tummy ache.

As socialists the world presents us with a bounty of tools for inflicting psychological self-harm. We can become perversely attached to this practice. If you are taking the rage you feel and channeling it into real-world organizing & action, then great. If you just sit in your apartment staring at the ceiling hoping for some piece of info to be the one that tips you over the edge then well... that isn't really a good way to live your one life.