Hi there Zach, long time ?
I also agree with the replies you got from fellow SL's thus far.
Besides the good & valid points made, it gives you the peace of mind when whipping that rod's ass for additional distance which is not the case on the main braid for fearing it might snap.
The heavier braid also helps against the bricks ito being heavier & hopefully be more abrasive, & once a turn on the spool it can give a little confidence to pull a bit harder on the fish in the wash should you require.
Changing casting braid leader on the beach is quick & easy.