Because they're not explicitly racist. It's dogwhistling, or talking points, which almost always indicates racism.
Someone saying that black communities should be more policed by dogwhistling that disproportionate crime warrants "assertion of police presence and predictive policing" by willfully misinterpreting statistics is racist, even if it doesn't explicitly say that black people should be harassed by police.
Does it bother you that some of the people most in favor of increased police presence in crime ridden communities are themselves black. Is it more likely that they are racist too, or that their material concerns for their safety are more legitimate than your racism dog whistle detector?
Someone saying that black communities should be more policed by dogwhistling that disproportionate crime warrants "assertion of police presence and predictive policing" by willfully misinterpreting statistics is racist, even if it doesn't explicitly say that black people should be harassed by police.