Well, one of the least ambiguous definitions of aging is "accumulation of damage at the microscopic/cellular level", that includes both accumulation of foreign matter over time (e.g., accumulation of asbestos particles, or cholesterol) and accumulation of damage due to matter or othewise (e.g., damage accumulation due to daily asbestos exposure without asbestos actually accumulating). So you essentially supported my point.

If you have a different meaningful definition of aging I'd like to know.