devtrackers.gg
This is not quite accurate.
A chamber can be parried or chambered.
The purpose of a chamber actually isn't to have the chamber mechanic activate, it's for IF someone feints their attack, your "mirrored" attack will hit when they feint. The actual chamber mechanic of deflecting the weapon into an attack is just kind of a backup for if they DON'T feint.
However, morphs are more common than feints and morphs will defeat chambers unless you cancel the chamber and parry.
It's also worth noting that after the chamber mechanic activates, you can morph the chambered attack which is useful against people who thrust a lot. Chamber the thrust, and morph your thrust into an overhead attack. But be careful of people who often morph thrusts, which is most people.