Well you need to hope that you and yours are never kidnapped, raped or murdered and have the person responsible free to walk the streets. Imagine what it might feel like to know after being raped that the person who raped you was free! If something like that has never happened to you then you have no clue what that feels like. I have no fear of ever being arrested because I don't do things to cause me to be arrested.
I don't have to imagine that, it happened to me when I was 12 years old. And even so, I am a strong supporter of the constitution.
You miss the point when you say you don't fear arrest because you don't do things that would get you arrested. In countries without strong civil rights protections, you don't have to deliberately do something wrong. All you have to do is attract the attention of a corrupt police officer.
Imagine this: your next door neighbour is a police officer. When you go outside to do yard work, you start to notice this guy staring at you in a way that makes you feel creeped out. You're not attracted to him, you haven't done anything to attract notice from anyone, all you are doing is trimming your grass. You're just trying to live your life and mind your own business.
And then one day, you are driving your car, following the speed limit, and a police car lights up behind you. The officer comes up to your window and you realise it is your next door neighbour. He claims he had you on radar going 35 mph over the speed limit. You know this is completely wrong, a complete lie, so you tell him no, you are sure that you were going at the speed limit, no faster.
As quick as that, he drags you through your open window, throws you to the ground, kicks you repeatedly and punches you in the face several times. He finally cuffs you and puts you in his police car.
You spend a week in jail without medical attention and without your family knowing where you are (no civil rights, remember?). Your urine is red coloured for several days. Somehow your family hears a rumour you may have been jailed and they get a lawyer for you. That lawyer discovers that you have been charged with resisting arrest.
And oh yeah, your arraignment won't be for another three months. At which time a judge will consider whether you might be released on bail. You won't get medical attention until you are on bail, so you're hoping your broken nose sets right and that the persistent pain in your side is just cracked ribs and not anything worse.
That's what it is like to live in a country without strong civil rights and protections. You don't have to do anything wrong, you just have to attract the attention of the wrong person.
After all, all *you* did was drive at the speed limit. Of course, no one in the judiciary is likely to believe you because if you were innocent, why did you resist arrest?