Once a private communications provider becomes recognized as communications infrastructure, they lose the right to police content that goes through their infrastructure. For example, my ISP, even though it participates in "spreading" my ideas, has no say in the matter. If you can argue that some random wedding cake bakers are part of "critical wedding baking infrastructure and must therefore be compelled to make a gay cake," you can argue, much more easily, that Cloudflare has no business deciding what content it offers its services to.