This is a fair point, and I agree.
However, this is also true of the other municipalities mentioned (Seattle, SF etc). So the point still stands, that if the average downtown bar in Boston is as white as the average downtown bar in SF, that most likely points to an issue.
Strawman, nobody is demanding this.
That's perfectly fine that you don't understand what needs to be different to make the area feel more inclusive.
The best way to find out what the issue is and what the solutions could be is to talk the black community. The whole point of the article is that the community wasn't included, so that perspective was never raised.
Here's me spitballing:
One solution could be "affordable housing" for retail. Commercial rents are very high in the area, which resulted in homogeneous national chains (aka, 7 steakhouses) opening up shop. Because of the US issues with income and race, expensive rent = expensive chains = aimed at whites.
Perhaps designating 5,000sqft for locally owned minority businesses could be one way to address part of the problem?