mental stress on pilots needs to be taken seriously
Yes, it does. One issue that seems to manifest is that of being reluctant to admit to an issue, or issues and probably down to in all probability suspension of medical and loss of earnings/career. Other than very small or poor airlines, an airline though will have the decent medical and license suspension schemes that can take care of the individual and address health issues and cover loss of pay and allows no increased penalty to the individual concerned to admit to an issue. Is it perhaps the case that something else is causing lack of admission?.