There is only a handful of known cases where people suffer from acute kidney injury after consuming psychedelic mushrooms.
Looking at the published cases, I know of 3. In the first case, it turned out the patient had actually consumed Cortinarius, which contains an "amatoxin", a harmful substance found in Amanita and (similarly) im Cortinarius mushrooms.
In the second case, the woman claims she only ingested psychedelic mushrooms, which unfortunately were no longer available for lab testing, but mentioned she did not experience any psychedelic effects.
The third case is a teenager who did in fact consume P. cubensis, which were available later on for lab testing. His buddies consumed the same mushrooms and did not have any issues. There might be an unknown predisposition, or a suspected cross-contamination.
I am not anyone's doctor, but across the long history of mushroom usage and given the known facts about the cases we do know about (actual Cortinarius ingestion, no psychedelic effects etc.), mushrooms can be considered rather safe to consume, if they are grown and prepared properly. This is consistent with current research, i. e. not just a personal opinion of mine.