Why businesses are finally talking about Mental Health issues?

To protect employees from stress.

Business involves potential risks and require high level entrepreneurship and skills for a smart success.  Anticipated risks can be focused on whereas non-expected always pause some problems  and the solutions may be very tough.  

Issues surrounding mental health affect people from all walks of life, including high-level corporate executives. In recent years, some top execs have opened up about their challenges related to mental well-being—with a candor that could have widespread effects.

Well known companies with sound hr practices want their human resource for a long period of time, and not exploit them  for a short period with (high ot rates that encourages emploees for ot beyond the normal stress levels). They have a leave policy which has to be utilised by the emploee in one year.