Yep - we get it. But some of us don’t enjoy the effects that microtransactions have on the game experience, and would prefer not to play those kinds of games. A filter whereby we could just hide those games, and browse ones that we would enjoy, that are more targeted for us, would both save us time and increase the likelihood of us finding a game we want to buy, improving the shopping experience and putting more money into game developers’ and Steam’s pockets. Similar to how the google play store offers a “premium/paid apps” section, because while much of the market prefers free to play and doesn’t mind ads or microtransactions, they know some of us loath it and would rather pay up front for an experience that doesn’t go there, and they make more money when they help shoppers shop.

It can be. It has been in the past. Locally hosted servers used to be common.