The article addresses this in the first few paragraphs. The author argues that whilst the 80% may or may not be accurate, they're using a definition of drone th

The article addresses this in the first few paragraphs. The author argues that whilst the 80% may or may not be accurate, they're using a definition of drone that encompasses many kinds of machine and not just FPV drones which is what he's talking about. He also says the number is highly misleading because most of his FPV drone missions were double-taps where the target had already been taken out by more traditional military assets, and that commanders used drones mostly because they were given them rather than because that was the best military strategy.