I’d be far more worried about this causing turbo cancer than immortality in dictators.
It turns out that if you trigger all four Yamanaka factors—yeah, turbo cancer. But if you trigger only three of the four, you can trigger a reversion to the stem cell state without the increased cancer risk.
What if we cure cancer with AI very soon? Give it 10 years.
It might be beneficial if it gives turbo cancer to the dictators, of course.