I'll grant that voting works only sometimes. And when it does change things, it's often not everything we want changed, and definitively not fast enough. But it can change things. If it didn't, voter suppression would not exist[1]. (One of the ways of suppressing vote is promoting voter apathy, by the way).
The only sure guarantee is that not voting doesn't work.
> peaceably
Even something as seemingly mundane as voting carries a lot of risk of physical violence in some places. That's how voting was in the US in the 1870s[2], if you were black. It might sound like a far away past for certain US citizen, but I (an European) own a house older than that.
