If the aging body is in unfortunate shape now, think 30 years from now: lumpy-dumpy, wads of loose fat here and there, sore joints, bald head, slow brain.
Are there role models for being 100 with dignity, grace, and acceptance? Finding joy in the soul and brain you’ve got, and ignoring the mirror?
One person comes to mind: Stephen Hawkings. He “lost his youth” to ALS in his twenties, married, had children, and speaks in public hauling his completely ruined body in a motorized wheel chair, using a computer to talk, activated by a single cheek. He smiles a lot.