When I was first diagnosed, I got something like the same advice from the Canadian Cancer society website. Right after diagnosis, lying alone in the middle of the night in a hospital bed, I went to the section on advanced cancer, and it basically said in more-polite terms "put your affairs in order and prepare to die." 😕

That was a low point for me. Fortunately, my oncology team was more clued-in and helped me to understand that these days stage 4 cancer doesn't always mean the end is nigh, and that I still have many years of living left to do.