When you try to help others and they don't listen to you, you have a choice. You can say "it's impossible to help them" and blame them for not being more open. Or you can view the situation as your own lack of proficiency at influencing and motivating others.

A blame-free attitude is the best path to choose. This can motivate you to develop your skills and talents on how to persuade, influence, and motivate. It could be that what you said is exactly what this person needs. As you enhance your presentation skills, in the future you will influence others to follow your beneficial suggestions.