this is what im thinking- perception issue.
Always flown into IAD vs DCA ( when travelling - not a pilot lol ) so im not even familiar with the approach.
But from looking at the playback on FlightRadar24, there are a LOT of choppers and light aircraft in/around DCA at given times. Several chopper routes have them hugging the right bank of Potomac. This one seeming veered off that right bank toward middle of river.
Im guessing there will be even more restrictions now after this.