I want you to do this. This is just a thought experiment - the world will not end if you just participate in a thought experiment - BUT DO IT. And don't assume you know the answer already. Do the following.
Imagine you have 8 men and 2 women.
Now tag 2 men and 2 women as "dead". Any 2, your choice.
How many men survived? How many women survived?
But didn't you tag 2 men and 2 women? Wasn't it the same in both groups?
And yet, ALL the women died, and only a quarter of the men died.
Which group is surviving better?
THAT'S what it means when half the cases are from the 20% unvaxxed.