Say you have an illness and it's terminal - the doctors can estimate how much time you have left - would you want to know?

Please help me out here – my dad’s dying, doctors gave him 3 months today (not being sappy, we’re not super close, this is just for background) and mother called yelling at me (becuse clearly I represent American medicine) about how it was “SO INAPPROPRIATE” for the doctor to tell him how many months he’s got to live and how (though she said she’d want to know) it’s so insensitive…and I said ‘look, you don’t live in a vacuum and neither does he and now you have 3 months to finally face that you have got to start thinking about how we’re going to survive once he passes’...with a business in debt that he’s leaving to me, with a mortgage I can’t afford, with credit cards of mine maxed out and putting me in jeopardy…I feel that of course if it were me I’d want to know how many months I had so that I can put my shit in order and not leave burdens on my family…but is it only because I don’t have cancer that I say this? if you’ve dealt with it, share your insight