Why doesn't yahoo care how removing this answers from will effect people's mental health and likely cause suicides?

FACT:  No one "causes" suicides.  A suicide is the decision of the deceased and no one else.

Personally I am hoping that it pushes you over the edge to finally actually kill yourself like you constantly keep spamming over and over.

Like any company they only care about profit.

It's about supply and demand, profit and loss.  What does "... how removing this answers from will effect people ..." mean?

Go find something else to do. Try taking a walk go outside and enjoy the sunshine. You will get to feeling a lot better.

Anyone who commits suicide because Yahoo Answers will  no longer be available already has deep rooted mental health issues that haven't been addressed, and if it hadn't been this that drove them over the edge it would be something else. 

It will be interesting - watching news stories - after this site closes.

Anyone who commits suicide because YA is no longer available has such serious preexisting problems that YA's demise will actually be irrelevant.