Gravity, pushes straight down and is hard to beat. With 5m of trunk leaning the wrong way, (towards the fence) it sounds like it won again.
I wasn't there and can't judge it though.
The best thing is no one was hurt.
The bad ones like that I have two ropes/cables, one to pull it over in line with the scarf and one directly opposing the endangered item, in this case the fence,
to limit the travel that gravity will exert.
It takes a bit longer in urban areas with area restrictions etc and can be difficult getting the two ropes/cables attached.
If the faller was the climber and he's in another tree like this it's pretty possible he'll block quite a bit more off the top of the trunk before the felling cuts.
Climbing - I have zero ability in this area and gave up climbing trees round 50 yrs ago which coincided with wearing long trousers..........