What is the primary obstacle for sustaining complex life around blue stars, even if they host planets in a habitable zone?

Answer

Extremely narrow window for evolution due to short lifespan

A blue star’s lifespan of just a few million years offers an extremely narrow window for complex biological life to arise and develop before the star dramatically changes or dies.

What is the primary obstacle for sustaining complex life around blue stars, even if they host planets in a habitable zone?
astronomylifespanstarsblue stars