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Most personal vehicles operate for many years with the same engine, with maintenance routines like oil changes and minor repairs being sufficient. In contrast, aircraft engines must endure much harsher environments. For instance, a typical aircraft engine operates at extreme speeds and temperatures, often exceeding 20,000 RPM and 1000°C, whereas most car engines experience significantly milder conditions.
Moreover, consider the operational expectations of an airplane: flying across the Atlantic multiple times a week equates to a staggering mileage that would far exceed a car's lifespan in a similar time frame. There is a clear distinction between the relentless routes that commercial aircraft traverse and the daily usage patterns of automobiles.