Why are there so many stars in the universe? Do they help us humans in any way?

Given the sheer number of galaxies in the universe, let alone individual stars, does our world, solar system, and galaxy not appear incredibly small in comparison to the entire universe? If so, then why are we asking, "Okay, so what use are all these stars to man?" Instead, we should be asking, "What purpose does the universe have for us, tiny and apparently insignificant as we seem?"

First, I suppose I should mention that a large number of the rarer heavier elements that are necessary for human survival on Earth come from supernovae, which are the remnants of long-dead stars that experienced a cataclysmic explosion near the end of their lives. In this way, we are, in a sense, more dependent on the stars that have passed away than on the stars that, aside from our sun, are still in existence today.

The Milky Way Galaxy, which had grown for several billion years before our sun was born, is thought to have contributed to the concentration of gases that made our sun possible in the past. As previously mentioned, this concentration likely contained heavier elements from supernovae from earlier stars. The majority of the gases in our galaxy's earlier stars would have been lighter, such as hydrogen and helium, with less chance for rocky planets like Earth to form around them. In contrast, our sun and planets had a richer mixture of elements to work with.

One of the great unsolved mysteries of the universe is the apparent, unaccounted for asymmetry between matter and antimatter. If matter was formed from pure energy, then we would expect an equal quantity of matter and antimatter. This begs the more fundamental question of why there appears to be far more matter than antimatter in the universe.

The universe contains a vast number of stars due to the processes of stellar formation and evolution. Stars play crucial roles in various cosmic processes, including the synthesis of heavy elements, the formation of planetary systems, and the provision of energy for life. Additionally, stars contribute to the understanding of the universe's structure, evolution, and dynamics through astronomical observations and research.