alt Hacker NewsCancer is known to be an entirely metabolic disease. Aging, likewise, is a metabolic failure (either implicitly or by natural design ie evolution, for whatever reason). Restoring metabolic function of cells always deages them. Restoring metabolic function of cancer cells always "decancers" them, for instance transplating mitochondria from a cancer cell to a healthy cell or viceversa. Curing aging necessarily cures cancer.
Aging and cancer have some shared metabolic pathways, but your framing is an extreme oversimplification.
Consider the accumulation of mutation that would occur in a cell not subject to aging.
You could just as easily find support for the counterposition: aging, in a sense, prevents cancer. [0]
0: Judith Campisi, "Senescent cells, tumor suppression, and organismal aging: good citizens, bad neighbors," Cell 120:513–522 (2005). https://pubmed.ncbi.nlm.nih.gov/15734683/
Edit: you edited your comment to talk about mitochondria transplants, but the science I am aware of actually points in the opposite direction: https://pubmed.ncbi.nlm.nih.gov/25565207/
Do you have supporting evidence?