Letting whoever is in control push their agenda through unchallenged would mean the defunding/elimination of the epa, the expansion of fossil fuels exploration, a reduction in climate related aid, etc...Make this make sense to me.
Trumps policies were enough under the current structure... a free for all for whoever has control could push us passed the tipping point.
edit: This is assuming you believe climate change is the existential threat i believe it is.
As long as one side rejects science im not for a free for all.