I agree with your sentiment that things should be simplified. Personally I don't like the term "renewables", since that bundles solar which is distinctly different from the others, delivering Joules to us from outer space, those are the only ones we can say really do physically add value.
We can't say that about energy of any kind from Earth. No matter what we do, we can't somehow multiply joules on Earth without some kind of cost in terms of something else on Earth which was sacrificed in order to have those Joules of energy.
This is really fundamental, the underlying reason we are on a hiding to nothing, whilst seeking to add value to Earth, by somehow just recycling Joules back and forth, there are extraction costs and pollution generated at every turn.
In contrast, we can create all of hydrogen activated food (See "Solein"), oils, fuels, and even water, directly, all from the Joules received from solar, with no costs to Earth whatsoever, genuinely adding value to Earth. The work done and things created with solar is genuinely good, no matter how we look at it.
But even more fundamental, we should realise this has implications on the issue of money.
We can see all of the problems with the system of money-as-debt. Even if we can't personally understand all of the details, most of us know instinctively that we shouldn't feel like prisoners of the system, commiting to lifelong debt, with no choice whether or not we wish to devote our entire lives to working mostly towards benefiting others, who already have much more than we do. We shouldn't be obliged to do that, no-one should effectively "Own" us, like modern day slaves. That's the way it is, but shouldn't be, and doesn't have to be.
The only way to break that chain of never ending debt, is to accept Joules donated for free at the input, and then to issue money on that valuable product.
Solar is the only one we can do that with, therefore the one we should concentrate all efforts on.
All others have some kind of cost to Earth, which we are committed to, by every promise to pay being effectively a promise to do work of extraction, which actually requires that there isva cost to Earth, to be redeemable.
I would have preferred if the study had revealed that.
It is little funny to me, to try to credit the EV industry as somehow subsidising green developments :) If EVs were truly green, they would be fitted with reversible fuel cells rather than toxic batteries.
This would integrate perfectly with the solar hydrogen ecosystem which is in process of forming.