Why do massive stars utilize their hydrogen fuel at a breakneck pace?

Greater gravitational compression leads to a hotter core.

The primary reason massive stars have dramatically shorter lives is directly tied to their greater initial mass. This increased mass results in significantly greater gravitational compression exerted inward upon the core. To counteract this intensified inward crush and maintain stability, the core must operate at substantially higher temperatures. This higher core temperature directly translates to a much higher rate of energy production and subsequent nuclear fuel consumption. Massive stars burn through their vast hydrogen stores at a breakneck pace, leading to an expenditure of energy that is far greater per second than that of low-mass, fuel-efficient stars, thus compressing their entire timeline.