.net 3.5 redistribution question

I’m making a deployment package for UE4 but one thing that prevents me from making it truly silent is the .net 3.5 installer as part of the prerequisit setup (Engine\Extras\Redist\en-us\UE4PrereqSetup_x64.exe") that normally happens during the initial run of UE4 through the launcher. I can run this manually with /quiet but it still prompts for user input. When I run the engine manually via the exe I can bypass this but I don’t know what kind of ramifications may ensue. Could someone verify how important .net 3.5 redist is for unreal engine 4?