Oil saves more lives than it kills

Maybe. That alone does not mean we should continue to use oil when alternatives exist.

>and it makes lives better for all of us.

No, it does not. There are many impoverished communities on the planet who reap relatively little or no benefit from oil use and suffer disproportionate burdens from its production and use, example: Africans.

> You can't just take the negatives and ignore all the positives.

You can't just ignore the negatives, or the evolution of the circumstances.

> the ability to keep an incubator running let alone the materials for creating

Oil is useful for creating and running an incubator, or any number of modern inventions, but is definitely not necessary for all of those things.