It's true. It's true that people were buried outside of an institution, just like it's true of any prison, asylum, etc. in all of western history. 215 isn’t that many over 90+ years of operation when you take into account typical child mortality of the time.
https://communities.win/c/OmegaCanada/p/12ih50dzcZ/215-bodies-found-heres-what-you-/c/
So he was controlled opposition all along. Not surprising considering his "intelligence" background.