It is insane how some people believe technology will fix everything. As you say, it will most likely be business as usual until industrial civilization collapses.
Given the extreme scale of the climate change issue and the lack of any significant action for decades - a lack of action that is, mostly, still a fact - one could argue that technology (massive scale geoengineering) is the only option left to deal with it. Maybe that wasn't the case 30 years ago, but it likely is now.
We would never have been able to mess up the atmosphere so much without industrial technology and now it is likely in my opinion that we will never be able to fix it without that same level of technology. At least if we want to avoid megadeaths-scale disaster (and even then, it's a very long shot and I doubt we will manage it).
Technology definitely can't fix everything. However, most of the problems we had 1,000, 500, 100, and 50 years ago have been fixed or severely mitigated by technology. While collapse is a possibility, I don't think it's an eventuality.
We would never have been able to mess up the atmosphere so much without industrial technology and now it is likely in my opinion that we will never be able to fix it without that same level of technology. At least if we want to avoid megadeaths-scale disaster (and even then, it's a very long shot and I doubt we will manage it).