There is no final role in your career. What you have now is part of what you may or may not become. It’s a step.
It can be incremental or decremental. You might discover that the role you’re about to do isn’t that exciting, or that it doesn’t suit you. Or even that you simply don’t want to do that job anymore.
Stepping down is often disregarded as if it’s admitting failure, but it’s an important and critical element. We should all be fine with stepping down. If we’re not we should ask why.
If it is for the money, then we might live a life way above what we deserve. If it’s for the status, then we got ego problems.
Stepping down is the clear indicator of honesty. If you’re not worried about it, then you’re ready to do your work and risk it, and get back to what you used to be if it doesn’t work.
This is fine too.