Settings are not a store and Chat Messages Talk

I wanted to grab the

TJSGameSettings

TJSGameSettings

stores, but it seems that they are not actual stores? They have subscribe, set, and update methods...
What I am doing here is essentially

gameSettings = new TJSGameSettings("pf2e-target-damage")
console.log($gameSettings.getWritableStore("classic"))

gameSettings = new TJSGameSettings("pf2e-target-damage")
console.log($gameSettings.getWritableStore("classic"))