That's a fair point but doesn't explain why ID & DOB are needed. I asked about this in another comment - in my country, you just need your postcode to find your polling place 99% of the time.
Interesting, but that doesn't answer my question. It's not in any way about voter registration.
I'm asking why can't you be told where to vote - the original thing the article is about - based on your postcode only. But I think I have my answer in another thread.
In Spain you don't have to register to vote every time. Just show up at the place you have to, based on the census.