Yes, because it gave scale to just how big the WWI and WWII population impacts where. Click the right arrow shows the 1946 version: https://en.wikipedia.org/wiki/Demographics_of_Germany#/media... and one more shows the 2019 version: https://en.wikipedia.org/wiki/Demographics_of_Germany#/media... (It sadly groups the oldest population only really showing the male vs female ratio despite WWII having killed so many women in that generation.)

Both countries have a similar percentage of 65+ year olds, but COVID gets rapidly more deadly as you get older and Germany‘s very oldest generation is devastated. For comparison 31.30% of US covid deaths are from 85+ year olds.

Now take a look back at the male and female 90-94 and 95-99 year old slices of both of those charts you said looked similar.