@maxred: it is twofold, point one - every local authority under ICAO regulations requires the pilot to operate compliant with the operations defined by the planes manufacturer; point two: the manufacturer complied with manufacturing and permit to fly regulations by issuing checklists in their respective type POH and/or separate checklist documents.
If later changes apply, it is not expected by authorities to release a new POH, which would be then plane specific and no longer type specific, but to have some addendum of unspecific kind, so that all documents can be used as if they would have been the original issued POH/checklist in that case.
So, yes, it is useless to discuss POH or checklist, because they are part of the internationally agreed procedures to operate a plane correctly.
And further yes, in reality many people give a sh*t.