We all need somewhere or something in whose presence we can remember departed friends and loved ones.
A grave is ideal. We can go there and reflect on our relationship to the departed. I often did this on my way to visit my Mother in the nursing home. I would stop by the cemetery, only a few hundred yards from her, and stand by my Dad's grave and remember how much he loved me, how much I loved him, and how much I missed him.
Now when I go that site, I can remember both Mother and Daddy. She joined him in 2005.
I had the same experience visiting the grave of Eloise, my first wife.
Cremation means the ashes can come to us and be a focal point of reminiscence.
Tears flow in either case, and we feel better afterwards.