In the theory-land of Solarpunk, pretty much all the more fleshed out example I’ve seen imagined also have a similar issue with reality. In particular I’m thinking of KSR’s (otherwise great) novels.
It’s a shame because I think most people would agree some version of “Star Trek” is desirable and working toward a realistic imagining of it helps work toward a path to getting there.
Sites like the one you're referencing (https://solar.lowtechmagazine.com/ if I'm correct) don't just exit to be normal sites with less emissions, they're also presenting a vision of the kinds of things our tech world could and should value differently.
Seriously though, high density works for a good reason. Solarpunk mistakes aesthetic that blends into nature with actual efficiency.
Besides, the environmental cost of AWS is not the power-draw of your VPS, it's the externalities of monopolistic-capitalism. You are not just funding private jets but a fascist oligarchy and handing them control. It's not even scifi doomerism any more. We are watching in real-time as American oligarchs dismantle environmental laws and I expect there will be glowing editorials in the AWS owner's newspaper.
In a similar vein, I presume that providing AWS as a publicly owned utility (socialism) would also not achieve their goals of individual self-sufficiency. I presume it's more prepper-ish than utopian and considers state centralisation too vulnerable to capture by negative regimes.