Arguments aren't always going to help, even strong ones. They can go against inertia, lack of will to get into some ideas and so on. So whether you resist to sa

Arguments aren't always going to help, even strong ones. They can go against inertia, lack of will to get into some ideas and so on. So whether you resist to say "I told you so" or not, don't expect to always be able to prevent such kind of outcomes simply with argumentation. Some just learn the hard way. If they are at least willing to learn from their own mistakes, one time will be enough. And if not, no amount of arguments will help anyway. And, you totally should be critical to those who didn't listen when they could. Don't simply shift the blame on the arguments.