I'm not sure what artemis or orion are, but you can blame defense contractors for this. Nobody ever got fired for hiring IBM or Lockheed, even if they deliver unimpressive results at massive cost.
I don't disagree that the engineering can be justified. But you don't need custom hardware to achieve radiation hardening, much less hiring fucking IBM.
And to be clear, I love power chips. I remain very bullish about the architecture. But as a taxpayer reading this shit just pisses me off. Pork-fat designed to look pro-humanity.