Steam为何新用户账户会包含大量游戏？

I'm curious about why Steam has so many games when I register for an account.

The reason behind this is that Steam is a digital game distribution platform. It allows players to purchase and download digital games. Many games can be found on Steam, which is why you'll see them when registering your account. However, you need to buy these games in order to download and play them on your account.