You say that like "not now" is "never". What is depressing is that people would rather let the tragedy of the commons and collapse play out at full speed, rather than giving ourselves a chance at achieving better sustainability.
I think we agree? There's a huge amount of effort being spent on extracting fossil fuels which will destroy our planet which could reasonably be used to develop sustainable technologies instead.
Sorry, I think you're right and I just read a sentiment that wasn't there.
Not now does mean for tens if not hundreds of thousands of years.