sonic #60, thank you; we agree about the issue, but not necessarily the mechanism of how operations work or should work.
An international industry cannot depend on local knowledge, or rely on extensive briefing sheets specific to certain airports, and particularly on obscure, unpublished assumptions or interpretations of general regulations.
Safety is defined by what is done, what is knowable; we have safety margins and adaptability for surprise, but these must not be taken for granted as a normal operation.
If we do, then when there is a challenging situation, as in this incident, the affect of degraded safety margins cross recognised and acceptable safety boundaries.
These ‘normal’ operations are unsafe.