Is this it, this is what is at the end

Sitting here in the doctors office with my mom is has sever vascular dementia. Seeing all the elderly come in with a wide range of health issues, frail, mind failing them. It’s just hit me the last few weeks, what’s the point of living if this is how it ends for the majority of people. I’m not suicidal, more nihilistic. Can someone answer this question for me as I’m having trouble finding the answer lately.