Well yeah, point taken that replicating everything everywhere and forever might be impossible. But I do believe at a minimum my identity should be portable and accessing Fedi (ie. in microblogging: posting and viewing a feed of the latest posts of my follows) should be decoupled from which instance I pick to access the Fediverse.
I don't particularly like how owners of instances which grew are now essentially locked in to having to spend 100s or 1000s of dollars a month keeping their now expensive instances running and providing service. This is a bad place to be for a platform ran by volunteers. Letting instance owners scale their service down as well as up would be ideal. But this requires at least decentralized identity, and at best some form of content hosting redundancy...
It's easy to say the current architecture of Fedi works when it's still small. Your instance has 139 users.. That's not intended as a slight. Hosting instances is good and I applaud you for it! But I wish it were easier to more equally share the load once the platform becomes more popular.
Not speaking for anyone but me, but sometimes when people say they something is too political it really means too much "extreme" political views. Personally I don't want to interact with extreme auth-left or auth-right content. I think politely discussing why access to housing should be guaranteed by government, or arguing for lower corporate taxes or whatever, isn't what bothers most people.
Fortunately Fedi allows instances who are fine with it host those users, and I don't have to see it. And Lemmy -the project- isn't political, it's just software for which I'm grateful to the devs.