America is in crisis, but the celebrities are thriving. They are beaming into our homes, reminding us to stay indoors and “stay positive,” as “we’re all in this together.” When I watch their selfie public service announcements, I find my attention drifting to the edges of the frame: to the understated wall molding visible behind Robert DeNiro’s shoulder; to the Craftsman beams on Priyanka Chopra’s balcony; to the equine wallpaper framing Zoë Kravitz’s crackling fireplace. “Staying home is my superpower,” the “Wonder Woman” star Gal Gadot reported from her walk-in closet. Ryan Reynolds urged his fans to “work together to...