Something that's come to light for me recently and which I'm trying to understand the reasoning for, is bringing OOP patterns like singletons, dependency inject

Something that's come to light for me recently and which I'm trying to understand the reasoning for, is bringing OOP patterns like singletons, dependency injection, visitors, etc. over to a multi-paradigm language like JavaScript. My understanding is that these were all basically clever hacks for working FP and procedural concepts into a strictly OOP language (plain module-level state, closures, and plain functions/pattern-matching, respectively). But you can get the same advantages without jumping through any of those hoops in JS and the like. Are they getting brought over purely as a comfort-blanket to Java/C# devs or is there something I'm missing?