In the current context, gerrymandering only serves to prevent impeachment at this point, but it could permit even more extreme executive-dictated, legislative rubber-stamping. In the long-term, it would stack the deck for partisan cheating.
Perhaps an amendment is needed to insist on independent, non-partisan district map commissions for every state at the federal level.
PS: I used to live in Greg Casar's ultra-salamander TX-35, but now it bypasses me down I-35 with an umbilical or tiny body from SATX to ATX. TX-15 ® an TX-28 (D) run through my ZIP Code now.
The real reason? It's because writing tests is a different skill and they don't actually know how to do it.