The benefit of the ability is not on the ability itself but on its potential: it can be used stratigiacally to terrify enemies to leaving you or your tower alone or an area (especially potent on mid lane 1st tower) or force them to disperse and psychologically due to its sudden, instant and immediate effect it catches off-guard inexperienced players, scares others and even experienced ones might be afraid to stick around if they haven't paid attention to your Ability Power or team position (ward-less opponents).

MAke them Squishyy!!!!

Use it during teamfights~~