That's an extremely bold statement to make.
The study the WSJ article was based on was retracted: https://www.pnas.org/doi/10.1073/pnas.2014148117
Directly from the authors themselves:
> Despite this correction, our work has continued to be cited as providing support for the idea that there are no racial biases in fatal shootings, or policing in general. To be clear, our work does not speak to these issues and should not be used to support such statements. We take full responsibility for not being careful enough with the inferences made in our original report, as this directly led to the misunderstanding of our research.
And there are articles that go into how exactly they got it wrong: https://www.washingtonpost.com/outlook/2020/07/15/police-sho....
On top of this, police shootings are just one aspect of policing. You can find various research that supports, for example, that you're way more likely to be pulled over while driving if you are black than if you are white. And that relative proportion drops at night because it's harder for them to see. They're then more likely to be searched after the stop, and more likely to be handcuffed.
And police brutality is much more than just shooting - I don't think we keep track of how often police officers use _any_ kind of force, but that's another thing that would also need to be evaluated.
There are just... so, so many things you'd need to consider and refute in order to make that statement.