This is a deeply personal thing. I am of the "we are all going to die and so let's plan" school but many people find the idea deeply disturbing and distressing. You can't MAKE people change their mind, but they may come to another thinking gradually. I recently heard an 80 year old with a terminal condition talk wittily and persuasively on the difference between accepting the inevitability of death and recognizing it as an empowering and productive process. A couple of 20 something years olds found it as captivating, funny and true as I did. Never underestimate the value of humour.