Sure, I mostly agree with you, but some people do care. As such I just wanted to offer this warning.

However, I do have the cremains for my dogs and my dad on a small, out of the way shelf in my living room. In my more down moments, it's been comforting to think of them as "there" even though I know they're not. Also it can be a focal point when I'm putting effort into remembering them. Finally, I have a young kid; having a physical object to point at helps with explaining death to them in gentler terms.