Yeah I didn't interpret it as having committed suicide. But his other poems hinted at him falling asleep at the line. So it could be exhaustion. Or, it could be metaphorical -- that a person's spirit fell to the ground and nobody cared.
But a person jumping from a roof is more similar to a screw falling.
I guess maybe if a person collapsed while working, others might stop working and help. But a suicide jump would be just another thing they can’t intervene in.
But poetry is always more fun to leave things ambiguous. Original words matter -- the hardest parts is to translate poems precisely, and try not to let your interpretation of its meaning overwhelm the original.