This situation closely resembled the status of Japan's air force during World War II, even General Feng Kezhi and Shu Country were inferior to that of Japan in World War II.
During World War II, Japan's pilot training was aristocratic in nature: the young people who underwent pilot training were carefully selected, excellently educated, and the cream of society.
Because ordinary Japanese citizens during World War II had minimal exposure to machinery and flying, their foundation was nearly nonexistent, requiring training from scratch.
Thus, before the outbreak of World War II, the Japanese air force pilots were extensively trained and elite, and after real combat experience, they immediately possessed formidable combat capabilities.
However, such pilots could not be quickly replenished because there were only so many fundamentally trained individuals; when one died, one was lost, and replacements lacked the time to mature and thus fell short in quality.