Gallant it is not.
Neither was flying passenger airliners into office blocks etc etc. 'Gallantry' doesn't come into it.
And there's nothing inevitable about collateral damage with Reaper strikes, indeed the opposite is true. UAVs operate with the same stringent ROE as manned aircraft, they have low-yeild munitions, and their endurance allows the operator to build up a picture of the battlespace that might not necessarily be available to the pilot of a fast jet who's busy flying his aircraft in a tactical fashion, managing his fuel, and trying not to get shot down, etc.