This 2013 Times analysis of gerrymandering‘s disproportionate influence on control of the Congress still holds true. Remember that safe seats (to one party) will promote intra-party competitions to be more ideologically pure.
Thus gerrymandering contributes to polarization in the Congress. Thus, even if your state is not highly gerrymandered, you have an interest in other states not being so.
Compare the seven most aggregious Congressional districts, below, with a sample Rorschack ink blot. “Tell me what you see?” – said the therapist.
Congressional polarization maps.