I think most people just want technology to work for them instead of being used to constrain them. When technology doesn't do what we tell it to, and restrictions are put on us artificially that power often ends up getting abused, we become vulnerable to threats and issues we're not allowed to see or address, opportunities for research and development go away, etc.
When it comes to the internet some of it is simply practical. Laws don't fix much because no government can force other nations to comply. Attempts to restrict the freedoms of "bad people" also impact everyone else on the internet and "make the internet less useful and less powerful for everyone" is a hard sell.
That said, very few people want lawlessness either. We want ISPs to keep their networks from causing problems for the rest of us. We want them to take internet abuse issues seriously and things like BGP hijacking are very much frowned upon. When networks routinely misbehave we even build and share blacklists to exile them from our global community.
> perfectly anonymous systems also give the attackers an advantage.
Again, you can't restrict the anonymity of attackers without hurting every single user in the process. Putting everyone at risk and causing people to fall silent out of fear just to make things marginally more difficult for attackers doesn't make a lot of sense. That said, I've yet to see a perfectly anonymous system, if one did exist, I'm pretty sure we could choose to opt out of using it.