If you start living a women free life when you are young and able, you will evolve and conditioned to live alone very well into your old age. You will set up a life that is suitable for your own style of sole living and thrive in it.
Many old people are so used to have people around them and when shit happens, they are left alone and it can be very hard for them.
one such youtuber is krazy koala. She is single, never married and no kids but her life is so full and happening. She actually travel to 193 countries solo and celebrate it after completing it. Tough mental strength and strong. dunno if here character profile fit her as she is an INTJ.