Yes, the ingame route planner does that (not sure if anyone knows why exactly). You force it the way you did, either by avoiding a system or by adding a waypoint (Vicamia in your case). In extreme cases you use the F10 map to plot your course manually via waypoints. This has the advantage that you can color the systems for recent ship kills with data straight from ccp, so it’s also a fast (but inaccurate) check for possible ganks.
There are websites and applications that combine both routing and intel, making them extremely useful. Eveeye Explorer (website) and Slazanger’s SMT (app), to name a few. These have live zkill connections, so your intel is as up to date as ESI allows, and have some powerful, customisable visualisation.