Gerrymandering has no effect on the Senate or Presidency making this largely a non sequitur. Furthermore, administrators of independent agencies (such as the EPA) need to confirmed by the Senate. Up until 2013, appointees could be blocked by a minority with a filibuster. That rule was changed in 2013 by a Democrat majority Senate under Obama, to make it such that a simple majority could force through any appointee.

That was one of countless examples of where powers passed by one side with a majority invariably end up coming back to bite then when they become the minority. The Founding Fathers designed our political system to be largely dysfunctional without widespread consensus. That was clearly wiser than the path we are increasingly choosing in modern times.

This is true in a world of balanced power between Congress, the judiciary, and the executive.

It is not true anymore, as all power is centralized in the parties. The House’s impeachment power will essentially never be used against the dominant party’s President, which allows POTUS to act with impunity and strongly incentivizes him to secure his party’s House dominance — a dynamic we’re seeing very explicitly at play over the last few months.

POTUS keeps the House reps in power, the House reps let POTUS do whatever he wants. Both win by severing their need to have popular policies in order to hold political power, so that’s what they work to do. Gerrymandering is an absolutely critical tool in this effort which is why POTUS has been publicly pressuring “members of different parts of the government” to pursue it (and they are!)

So no, it’s not a non-sequitur.