A solarpunk society would have so much more economic value from labor, it's not even funny. People wouldn't be burned out but doing things they actually value, designed around their continued happiness and productivity. People would be doing actually useful tasks rather than playing fief to a shitty manager browing reddit for as long as they can get away with.

With sustainable products built to last, the material wealth of society would skyrocket, representing the last 50 years of economic production rather than the last 10.

Hell, maybe we'll even have a museum exhibit where two "legal person" corporations keep selling the same rusty nail back and forth for €1 billion to make the solarpunk nominal GDP higher too.

So no, it's wrong to say economic growth itself is the problem. Pursuit of economic growth is a problem, but as the Trump administration helpfully demonstrates, that was never the point of capitalism. The point of capitalism is to facilitate exploitation, creating a legal framework to avoid culpability and to dump "externalities" onto the victims, giving victims as few rights as necessary to dissuade them from revolution.

Capitalism is perfectly willing to ruin an economy to protect exploitation, and likewise we can be perfectly fine with growing an economy to improve life for everyone and everything in nature. Those food forests aren't going to tend themselves. ... Not entirely, anyway. That would just be a forest.

Fossil fuels just indicate an addiction to convenience. The econony built on convenience has only created the mass-species threatening issues we face today.
When capitalism ha$ finally finnished its mass murder and suicide, maybe the few survivors (if any) will have learned the lesson of avoiding its lies.

Before oil, there was livestock and wagons. After oil may only be snow capped plains or glowing hot glassy sand traps....