Are you really so naive that you believe people don't ever prey on others?
Cops are great when you need someone to show up 30mins after any emergency & take notes. And the people who choose to become cops are also 3 times as likely to abuse their spouses. Do you really want a monopoly govt agency that is funded by theft, that can legally steal from you, & can shoot your pets, to also be able to legally disarm you completely? Do you just like being ruled by an unaccounbtable gang? Because it seems like that's what you're asking for.
Do things tend to get better or worse when power disparities grow? Guns reduce power disparities. They are equalizers. Poor people & rich people & people with political power tend to suffer from bullet wounds quite similarly. "An armed society is a polite society" because people understand the dangers of escalation & conflict. But people who aim to CREATE conflict or to take advantage if others, always want their victims disarmed. Do you want to help people take advantage of others? Do you want to make it impossible for vulnerable people to protect themselves? Do you want the vulnerable dependent on you or others so that you can take advantage of them?