I can't begin to imagine life as just a ... database guy, or a backend guy or just a frontend guy. Perhaps it needs to be aligned in everyone's eyes that we cannot be as good at databases as one that spends most of his time doing databases. But there are pros and cons to our kind of knowledge.
I can argue pro and con SQL vs. NOSQL, to the limits of my ability, or argue for this frontend framework or that, or consider various languages or architectures for the backend, or discuss about how we'll deploy the production version of whatever it is that we're building, or how we'll do development side CI/CD and so on and so forth. What am I? I'm open to the idea that I'm a fraud, but I like to consider myself a full stack.