I'll play devil's advocate.
The new interstate can use the Gilcrease to bypass the section of I-244 in question. Whip up a better interchange on the west end there and that problem goes away.
The thing about downtown freeways like Tulsa is the vast majority of the traffic has an origin/destination downtown somewhere. Very little of the traffic is thru traffic, especially in a place like Tulsa where the major interstate completely bypasses the urban core. Yes there's a lot of traffic on these freeways, but that's because most of it is getting on/off somewhere around there. The comparatively little thru traffic gets a minor inconvenience by taking some sort of belt routing. The rest of the traffic melts into the street grid to take more direct routes to where those drivers are going. So you have to drive seven blocks through downtown instead of whipping around to the other side of an inner freeway loop and getting there two minutes earlier, big whoop. I'd hardly call that an onerous burden.
We've learned over the last few decades that it is extremely difficult to fix the mistakes of past generations in our cities. And we've also learned that once an urban neighborhood is significantly altered by some kind of large urban renewal project, you will never get the old neighborhood back. The circumstances that led to that neighborhood cannot be recreated. Building practices change. People's needs and wants change. New technology makes certain features anachronistic. And more and more, every Tom, Dick and Harry feels the need to have their specific, whiny voice heard. "What about parking? That building is ugly! I associate that type of thing with crime in a way that definitely doesn't make my biases obvious!" Simple things like it's way too expensive to build things out of masonry these days, so you'll never recreate all the 'quaint' brick architecture that was so prevalent a hundred years ago.
So it's true to say you're not going to recreate Rosewood simply by removing a chunk of I-244. But does that mean we have to be completely invested in the status quo? I'm seeing a bit of reverse-NIMBYism here. "You can't tear down my freeway and put up a neighborhood!" It's the same energy.
They really are only talking about taking out the north downtown section of I-244 from the Tisdale to US-75, just 10 blocks or a little less than a mile. Greenwood was only in this section. The section of I-244 just east of downtown was a poor white area, in fact that neighborhood was setting for The Outsiders.
The biggest problem with removing the highway even in downtown is the section that is actually historic Greenwood has two historic churches, the Greenwood Cultural Center and OSU-Tulsa directly abutting the highway to the north of the highway. And the south side of the highway has the remaining historic Greenwood buildings, Tulsa's baseball stadium and the park that is a memorial to the race massacre right up to I-244. Removing the highway would just create a 200-300 foot strip of un-developable land between all this.
Beyond that, the section of Historic Greenwood to the south of the highway, the part that is in downtown, is gone. This area was the commercial "Black Wall Street" heart of Greenwood, but today it is completely redeveloped and gentrified. There's no land left for the community to rebuild. The pictures on google maps are very badly out of date.
The western section of the highway where if I-244 were removed that could be redeveloped is NOT part of Greenwood, it was actually a wealthy white neighborhood called Brady Heights, named for an early Tulsa city father and KKK member. Removing the highway here would only connect maybe five blocks of developable land.
So if I-244 was removed you would spend $500 million plus to reconstruct two 3 stack interchanges and remove a busy highway that would create a very small amount of developable land in the wrong location.
Better to keep the highway as a memorial to the wrongs that were committed.