Even etsy creators advertise their more profitable products instead of things that barely sell. Apart from the top banner on the store page everything steam advertises is based on demand, calculated by sales numbers and whishlists, and relevance to your library.

Even decentralized platforms like Lemmy operate under this exact principal, a decentralised gamestore would show you the same games as steam does.

If you want to see everything, you are free to set your steam store to new releases. Have fun sifting trough hundreds of cash grabs and “garbage” first time passion projects to find a single interesting game.