Email is not the same, if it was, then mastodon would just be another email client.
One of the biggest issues with federated social media is discovery, a specific problem that email doesn’t deal with, sense communication with email is primarily done between individuals with known addresses.
It’s also easy for people to comprehend email because it has an easy analog to regular addresses and traditional communication (I’m writing a letter on my computer and it’s getting sent to someone else’s computer)
Finally, it took email decades to get to the place it is today, and 99.99999 percent of people using it don’t understand how it works in the slightest, like at all.
But why would you run steam under wine? The games themselves make sense, but steam not so much.