All the testing, as well as my own experiences show the opposite to be true. A big reason the military chose semi-autos is because they function more reliably when filthy or abused. The cylinder, all chambers, the ejector, trigger and hammer are all exposed on a revolver creating many places for foreign objects to mess things up. Or for them to be broken or damaged if dropped. On a striker fired semi the trigger is the only moving external part. And if a semi does go down it can be disassembled, the problem corrected and back working within minutes, even seconds. A revolver will require a trip to the workbench to get it working again.
Revolvers have their place, and if kept reasonably clean are about as reliable as possible. At least for the 1st cylinder. Your points about ease of use by those less familiar with firearms it spot on.