Why is it this way?

I'm logged in to Mastodon, but when I view a link to a profile on another Mastodon server it prompts me to log in and informs me I can't if my account is hosted on another Mastodon server. This is adding several steps to what other social networks do in one click.

More people need to know about r/Superbowl - it’s nothing to do with American Football.

https://www.reddit.com/r/Superbowl