It’s not that they don’t worry, it that our organs (like everything else 👎) show signs of wear with age. That is why the number expectations or parameters change, depending on age. The other thing they consider is how quickly your numbers are changing. For instance if it took 5 years to get where you are, the progression may be slow, therefore not as concerning as a rapid change.
It’s awful that you don’t feel cared about. I’m really sorry!

Cannot tell you how surprised I was to get a transplant at age 78. They do care!