Unless I'm planning to replay the game to try a different path/style I'd usually pick up the walkthrough to avoid missing content
Here lies the problem. Japanese VN perfected these system and you tend to have in game flowcharts that help. We don't have them in western VN so there is a need for Walkthroughs.The grind in visual novels is replaying the game multiple times in a row to find the choices needed to get the route you want.
As a kid I would play Japanese VNs without guides but really walk through mods is simply skipping what would just be grinding in other games and all you are doing is saving time.