Beat case scenario: your grave sits unlooked at 99.9% of the time and wastes space. In a couple hundred years some douchebag archeologist who wants to pretend they aren’t a grave robber will fuck with your shit in the name of “science”.
Setup a shrine for your loved ones in your house if you have to. The world is for the living. When I die toss me in the nearest dumpster.
By this logic everything we’re doing is worthless and pointless because the sun is going to explode so we shouldn’t worry about saving anything because it’s just going to be exploded.
What logic do you imagine OP is basing his opinion on that would bring you to this conclusion?