I imagine blameless postmortems sometimes happen because people want to avoid blame. So they argue that all the cool places do "blameless". We should try that

I imagine blameless postmortems sometimes happen because people want to avoid blame. So they argue that all the cool places do "blameless". We should try that too! And then the organization doesn't understand the actual concept behind the idea (nor did the suggestor want that). Instead the organization learns "we have decided not to blame anyone". And then everyone involved is satisfied.