Isabelle, as someone who spends an inordinate amount of time on WikiTree but also occasionally takes a fresh-air break to do photography for Find A Grave, I appreciate all aspects of your comment.
Yes, FAG entries -- most especially, where birth dates are concerned -- can be misleading. Nonetheless, gravestone data is a valuable resource, and while it shouldn't be regarded as the last word (which is quite ironic, if you think about it), I'm glad to have the access that FAG provides... and glad to contribute to that resource.
In the end, while quality-control issues are always with us -- no matter what the site -- and loom larger with some sites than others, genealogists are in the end one (very) large family. I appreciate WikiTree's commitment to setting a higher bar than most other sites, and at the same time am also appreciative of the efforts of others working in other parts of the vineyard.
FAG is an entry point both for many amateur genealogists -- and many contributors. If its offerings are of variable quality, it's still a very valuable resource and a very useful gateway that stimulates broader and deeper interest in this work. If the record it offers is sometimes misleading, well, nonetheless -- in genealogy as elsewhere -- to (gently) quote Robert Frost, "No one can know how glad I am to find/On any sheet the least display of mind."