That some extreme outliers exist, doesn't change the fundamental fact. And the idea that you can somehow graft parts of the DNA of aspen groves, hydra or similar into humans to make them live longer is grotesque (to me, I should add. I accept that I might be a relative lone voice in the science-optimistic desert here)
With enough study, we could conceivably engineer better cells. If we can then implant those cells into our tissues, then we could slowly replace all the 'faulty' cells in our body with the immortal version 2.
https://en.wikipedia.org/wiki/Negligible_senescence