Sorry you believe in such a loose interpretation of the Bible. One year means one year to me.
One year surely means “one year.” However, one year doesn’t always mean 365 days.
We don’t know how time was measured by all the ancestors of of the Jewish people 10,000 years ago.
What we DO know is that ancient Jewish people has a literary style of exaggerating numbers when they wrote. They would do this in the same way we used the made up number of a “zillion.” Also, the same way kids will exaggerate numbers by saying things like “you’re like a hundred years old” to their parents.
The ancient Jews didn’t have a made up number like “a zillion” like we have today. So they often used greatly exaggerated numbers to delineate large amounts of time.
They also were not 100% concerned about listing every single generation when listing a genealogy. This is why it’s proper to called Jesus the “Son of David” even though David was obviously not David’s son. It’s also why Joseph was properly considered a “son of David” or “of David” too, even though David was an ancient ancestor and not his father.
Just because someone is listed as the “son of X” or “daughter of X” could mean that they were the grandchild, great grandchild, great-great grandchild, etc. It doesn’t automatically mean that they were solely the child of X.
It would have been very proper & common for a great-great grandfather living in the ancient world to refer to his children, grandchildren, great-grandchildren, & great-great grandchildren all as simply his “children.”
So while some of genealogy is surely mentioned parent/child relationships, it’s not 100% certain that it always is (esp with the older generations).
Think of it like this too… if a father dishonorably died or was dishonorably removed from the family, it was not uncommon for the grandparent or an uncle or older brother to adopt the child. The biological father would have been removed from the family history.