A lot of the bad stuff that happens on the internet is directly related to perceived anonymity. If you want to bully, harass, make bigoted statements, disseminate propaganda, or shill for a corporation, it’s better to be anonymous. If a country gives its citizens the right to free speech and reasonable protections for privacy, a non-anonymous internet is better. Besides, anonymity on the internet is an illusion for about 99% of internet users. All of the big social media companies know who you are - their whole business depends on the data they collect on you, and that data is worth much less if it can’t be associated with an individual. They also have heavy incentives to share that information with the government. Try making an ‘anonymous’ threat against your country’s leader and see if any law-enforcement types decide to visit you.