The conclusion here is actually "these things are not caused by racism, because you can completely remove white people from the equation and yet the situation only ever gets worse".
Social policies combined with demographic realities are the proximate causes here. Continuing to paper over the latter with the former just entrenches the issue generationally.
"see what happens when white people are completely removed from the equation" is not an experiment that is possible to run.
So, no, you can't empirically do what you're saying you can do.
If you have a thought experiment or an approximation in mind, do share.
Here's a thought experiment: every judge, lawyer, jury member, and police officer is now black. If you think that is akin to white people disappearing, then we disagree. e.g. who wrote the laws? who stands to profit the most from incarceration?
It's called "systemic" racism for a reason.
The extremely abbreviated way to make this point is to say "racism is over because Obama, and Kamala, and black faces in high places".