The point I'm making is that use of the term by non-black people may be a useful part of dismantling the apparatus of racism.

Not really. It's irrational, but it's also meaningful that non-blacks aren't 'allowed' to say that word. It's a reminder that things aren't equal, things aren't fair, and the way this currently affects you is mildly unfair, but also entirely symbolic.

What evidence do you have on systemic racism? (How do you define it as well?) Also, how do you suggest one works to fix it?

That doesn't help find systemic behaviour. Nor is it replicable or scalable. I will ask again, do you have any evidence to support your claims?