

By electric planer, do you mean a handheld planer, or a pass through planer? If you mean the pass through kind, then that’s probably fine, but you might have a problem with it taking chunks off the edges, due to the orientation of the grain.
If you are just doing a single slab, building and setting up a router sled is more work than doing it with a hand plane, manual or electric. So I would go that route if possible.
That being said, it’s going to crack as it dries unless you cut it before it starts shrinking.
VERY specific people would have been better off born 20 years ago.
The vast majority of people would be better off today.
You can imagine in another 20 years that would be different, but almost everyone is better off today than they were 20 years ago, and they will be even better 20 years from now than today.
Specific groups may have a harder time in one time period or another, but society at large is getting better at the world scale over the long term. Hope still exists.