The crew did what they did based on what they saw that day.
If the plane could not land at the destination nor alternate then someone stuffed up the flight planning - dispatching above the RTOW which more than likely was MLW (Structural) limited.
On any given day you should have 40% more runway than a maximum performance stop on dry and another 15% margin on a wet runway.
Yes test pilot figures some will say but the humble line drivers have the 6-7 seconds from 50 feet to touchdown plus 15% which is achievable...unless you float or hold off for a kisser.
These should definitely fit into the test pilot figures with a reduced margin. The ROW/ROP differs in that it calculates an auto land so slightly longer flare but the similarity is the MAX BRAKING.
More to the story than what's on AV Herald. Irrespective if you had x or y margin, classic airplane with or without RAAS/ROW/ROP you'd be crucified if you went off the end.
1st GA - justified, rest I can't judge yet without the full story but have an idea.