The short answer
You work hard because you choose to, not because something is chasing you. That's the difference that matters. The research on workaholism centers on compulsion — the inability to stop. You're describing the opposite: real agency. The ground under you is solid. Trust it.
Research on workaholism draws a clear line between working hard and working compulsively. The compulsion piece — the part where you can't put it down, where stopping feels like danger — is what does the damage. You're telling me that piece isn't there. That's not a small thing. A lot of people work hard and tell themselves they could stop, but feel the floor shake the moment they try. You're saying the floor holds. That's worth naming out loud.
Marcus put it simply: the mind that governs itself won't turn against itself. It won't manufacture fear. It won't drag itself into craving. What he's pointing at is the same thing you're describing — a kind of inner steadiness that doesn't depend on output to feel okay. You're not running from something. You're moving toward something. That's a different engine entirely.
This week, test the trust. Take one afternoon fully off — no checking in, no 'just one thing.' Not because you're broken, but because you believe what you said about yourself. Let the stillness confirm it. If it feels easy, good. If something small tightens, that's useful information worth sitting with.