SND
Quite agree, thorough knowledge is required so you can back up an unpopular decisions !
I think you're saying 109(2)(b) is not an issue as RVR was not reported. (and converted met viz does not apply for take-off). But I take it, you're not suggesting that this alone is the only go/ no-go factor to consider?
Accidents like this are dreadful, but if the industry can learn from this and make a re-occurrence less likely, then that's got to be beneficial.
Many factors could be at play here, for instance;
1. Crew experience
2. Crew training with respect site selection, performance, take-off profiles, weather minima, etc
3. Company culture
3. CRM - crew - crew and pax, etc