Townie Households Almost All Have Same Structure

I have the same issue.
Sometimes I pretend that townies with single parents and children are looking different is due to adoption or I add a spouse that can explain the different appearances

I edit townies to match their last names or just change the last names.
And townies with the same last name, I make them related.

I like editing townies anyway, but it’s getting to be a burden. I know deleting them is faster, but what’s the point if the game isn’t just going to generate more