The problem is funerals are associated with sadness and grief
In general, yes, but not always. I loved my mother's funeral. I met people from all parts of her life from the age of ten, people she had been at school with during WW2, mothers of people I had been at school with, all my siblings and most of their offspring (we are a spread out family so this doesn't happen often), my children's cousins and second cousins, and so on.
It was not a sad occasion. It was a happy and respectful goodbye to a long-lived, good woman who had a peaceful death. This was almost five years ago and I wouldn't say I have felt much, if any, grief. Mum took a long time to fade out quietly so nothing was a shock. In the last five years, what I've mostly felt is more understanding about my mum, more appreciation of her qualities and weaknesses (we all have them!). That has been a kind of comfort, very different from the grief I felt when my dad died at a much younger age. I missed my dad. In some sense I still do. I don't miss my mum. Somehow her life seemed complete when she died. I simply remember her, and what she taught me, in all sorts of ways.
People who hate funerals can just stay away from them, surely?