He's wrong in most things — at least as you ascribe them — and almost everything in the degrowth space is nonsense.

https://cleantechnica.com/2023/03/14/with-heat-from-heat-pumps-us-energy-requirements-could-plummet-by-50/

https://cleantechnica.com/2023/07/04/how-many-things-must-one-analyst-get-wrong-in-order-to-proclaim-a-convenient-decarbonization-minerals-shortage/

The cost of raw materials and land area is fully priced into renewables, yet they are cheaper than nuclear everywhere. It's almost like nuclear proponents favor completely different economic models for nuclear than for other technologies. And, of course, they have to.

https://cleantechnica.com/2023/11/30/what-drives-this-madness-on-small-modular-nuclear-reactors/

I hadn't heard of this particular French academic before, and I suspect I won't again.