TL;DR: How does MGTOW lifestyle look like in the long run?

Hey all, I'm fortunate to have found this sub at the age of 16 (now 18) after my first real relationship went sour. I learned that you can move a mountain or part an entire ocean for a woman - yet if she doesn't find what she needs in you, she will look at you as garbage in the romantic scene. I've been reflecting for a long time and accepted the fact that if girls are not into me, fine. Why should I bother going after them like an animal? I've had enough of being bitter-thirsty and decided to adopt the MGTOW philosophy. Ever since, I've found so much solace in knowing that the chains of relationship and marriage cannot touch me. I can imagine myself living a fulfilling and meaningful life in the future because of my desire to excel in STEM academia.

The problem I'm facing arises with my age and surroundings. I have conservative parents who say "oh you're too young to be saying that" "you'll change your mind when a hot girl is into you" "what about the future, you're going to die alone."

I'm perfectly fine with the first two concerns. My problem is the last one. No matter how sharp our minds are. No matter how fit and healthy are bodies are. We will get old and in all honesty, that scares me the most. What if I get too old and cannot afford to live by myself? What if I need to live with my siblings family to have at least some social interactions? What if I cave into societal norms out of necessity?