How don't see how making our lives more dystopian can be a net benefit.
How many of us expose different aspects of ourselves through different identities? Maybe most people are happy to show everyone all aspects of their lives, but I'm not, in part because who I am could get me or the people I meet in trouble, harassed, imprisoned or worse in some places.
Anonymity should remain a fundamental right. We have the right to live and expose different parts of ourselves to different audiences without overlap.
Anonymity is also a counter-power to governments. A government that knows all about its citizen is bound to abuse this power.
We see it in many democracies; elected governments enact laws that restrict freedoms to keep itself in power (Russia of course, Turkey, Algeria, but also EU countries like Bulgaria). Tools like government-issued ID that become mandatory to express yourself online are doubly dangerous: they make it easy to target those who cause trouble, and they can be used to remove means of expression (who can listen to you if you are denied an ID and there is no freedom of press to expose the abuse?).