I love find a grave. I trust what I see printed on the gravestone, only until I have uncovered conflicting information. A great thing about Find A Grave is finding cousins who are researching the same people as me. I can make contact and tell them about wikitree. A place where someone is buried is very important information. When FindAGrave is used as intended, this is vital information, and when started, Find A Grave was the best way to collaborate doing that. And I argue, still the best way. As with all genealogy sites, people use its structure to help them do what they try to do elsewhere, and that is build their family tree and history. As much as you may dislike it, It is a great and popular software that can build family trees. I say, embrace it, and if you, like me, are super interested in collaboration, use it when you can build connections with your cousins.
My ancestors are buried in one place. When people visit their Find A Grave sites, I want to know, I want them to contact me, I want them to make improvements.
One person's frustration is another's opportunity.