What is the fundamental reason massive blue stars deplete their core hydrogen fuel much faster than average stars?
Answer
They must sustain nuclear fusion at a high rate to counteract immense inward gravity
Because blue stars are far more massive, they must sustain nuclear fusion at an astronomical rate to counteract the immense inward crush of gravity, leading to rapid fuel depletion.

Related Questions
What single factor overwhelmingly dictates the ultimate fate of a star?In the stellar spectrum, which color light carries more energy and requires a hotter source?What is the estimated main-sequence lifespan for the blue supergiant Rigel?What is the fundamental reason massive blue stars deplete their core hydrogen fuel much faster than average stars?What is the general range for the lifetimes of various kinds of blue stars based on stellar evolution models?What evolutionary stage immediately follows the main sequence for a high-mass star exhausting its core hydrogen?Why are massive blue stars, despite their brief existence, visible across vast interstellar distances?What astrophysical phenomenon describes hot, blue stars found in very old star clusters where they should have already evolved?What is the leading explanation for the existence of blue stragglers in ancient stellar populations?Compared to the Sun, where must the Habitable Zone be located around a hot, blue star?