Why would galaxies and stars fail to form if the universe expanded too quickly?

In the context of cosmology and the anthropic principle, the formation of galaxies and stars relies on the ability of matter to condense under its own gravity.

If the universe had expanded much faster than the critical rate, particles of matter would have moved apart from one another so rapidly in the early stages of the universe's history that they would have been unable to cluster together. Because gravity is a relatively weak force, it requires sufficient time and proximity for matter to overcome the expansion and collapse into the dense clouds—or protogalaxies—necessary to form stars and galaxies.21

Essentially, an excessively rapid expansion prevents the gravitational instabilities required for large-scale structure to develop. Without these structures, the elements heavier than helium essential for biochemistry would not be produced, as these are forged through nuclear reactions within stars. Consequently, a universe expanding too quickly would likely fail to produce the complex environments required for life to exist.2