The part you did not quote is that, at the time the Shuttle was being designed, 2/3 of satellites launched were in geosync orbit. Looking them up now, Palapa B-

The part you did not quote is that, at the time the Shuttle was being designed, 2/3 of satellites launched were in geosync orbit. Looking them up now, Palapa B-2 and Westar 6 were both intended to be in GEO but failed, and were retrieved in LEO.