I think this one fits here:

"Never attribute to malice that which is adequately explained by stupidity."

In rocket science, is the bar for stupidity really really high, or really really low?

Sounds like an excuse for how stupidly the Trump administration is acting, but it's actually an extremely toxic combination of malice plus stupidity. You don't have to be smart to be malicious. Occam's razor says "why not both?"