In SW 2018. I used to use NX for plastic parts, and all we had to do was choose the parting line, pull direction, and degrees of draft and it would apply draft to every surface according to those parameters (been a few years but this is how I recall it).
In solidworks you have you draft each individual face? Is there a more efficient way to do this? It's going to be a simple tool that only pulls along one axis (two halves of the tool).