Personally speaking I am no one to tell a professional athlete whether they need to be sharing more or less. It is just that one needs to understand what their values are, who they are as an individual & whether they are comfortable about speaking or writing about any topic. If they feel like something is wrong- they should be keeping their perspective in general about that topic but if they feel like they are introvert and not much vulnerable, then they can keep silent also. But I think so it is better if professionals stand up and speak, not every time but when they feel like.