The political costs of losing a pilot outweigh the performance advantage of the A10 in most situation, imho. Drones are not expendables, but they are much more expendable than pilots.
You are probably right on the political side, but I am looking at the tactical side - where the capabilities of the platform determine what is obsolete, not the proclivities of the politicians.
Until they have an A-10 30mm cannon in a commensurately survivable drone, the A-10 will remain a superior platform.
Once shooting starts, most political considerations should be thrown away, imho.