It's also IMO valid. CRUD isn't derogatory. It's also not particularly illuminating though. Almost everything is a CRUD app. If you get the fundamental data structures, access patterns, and control flow right for those CRUD operations, you have the foundations for what can be a successful app. And then you enhance it further - games add nice graphics, collaborative workspaces add good conflict resolution, social media sites add addictive recommendation systems. The core is CRUD but that doesn't mean the work stops there.
Someone who worked more in embedded systems may say something like “everything is ‘just’ a state machine.”