Yes you are exactly right. Energy jobs are rare because they are so productive. Coal miners, and to a much greater extent oil and gas workers, produce roughly 10 times as much energy in one hour than a solar panel installer produces in one year. Of course the panels keep producing, but even adding up all the "free" energy from the panels, the payoff is about 10 years.
There will indeed be lots of manual labor jobs installing panels. But it will be very low productivity and require trillions for the panels themselves. And the energy payback will take 10 years minimum.
Of course the panels keep producing, but even adding up all the “free” energy from the panels, the payoff is about 10 years.
And that 10 years of intermittent energy production is just about the usable lifetime of the panels....if you are lucky.