You're misinterpreting your experience. You were trying to do something inappropriate for your aims based on poor advice, and now you're doing something more suited to what you want. From that you can't infer that lifting heavy is overrated. You can only infer that lifting heavy isn't suitable for people that want to achieve the things you want. Try to understand the context of your experiences and how your desires relate to what you were doing, rather than making general claims about the things you were doing independently of your desires.