In the model phrase *raʾaytu asadan yarmī*, a lion is the source, and a courageous person capable of shooting is the intended target. The verb yarmī acts as an indicator excluding the literal animal; courage is the linking feature, though not an intrinsic part of either kind's definition.
Compare the Qur’anic expression “announce painful punishment as good tidings.” There the contrast between a positive announcement and punishment produces an ironical effect, rather than drawing on the lion's familiar courage.
Both are metaphors, but the reason for the transfer and the rhetorical purpose are different. The analysis must recognize that difference instead of supplying the same generic explanation to every example.