But you need more than one. You need dozens at the very least to saturate a Covenant warship's point defenses.

: We saw Longswords fly close enough to destroy large Covie vessels were the
: Longsword to have a ss drive in it.

And if Longswords regularly carried weapons that could one-hit-kill a Covenant warship instead of the scratching they usually do, they'd probably be prioritized by the point defense system.