I was appalled to discover that my daughter (now 12) would have homework in K. However, we did it together and it set a tone of enjoyment and time scheduling. I always saw that she completed all her homework and worked any bonus questions.
Fast forward to preparing for 7th. She would never think of homework as an option, knows there is time to spend on homework, and enjoys it.
In retrospect, they knew what they were doing when they assigned it. It was not difficult and sometimes fun. I just saw it as a time to understand what they were doing at school. It is more for attitude than learning.