What you've done here is called a fully-general counterargument. You should be suspicious of these!

If capital inevitably follows destructive local maxima and defectors get eaten, then no coordination problem has ever been solved, right?

But we banned CFCs! We got lead out of gasoline! The Montreal Protocol exists and worked.

What you're describing is the default behavior of uncoordinated markets, not a physical law. The entire history of regulation and international treaties consists of mechanisms that override local incentive gradients. Sometimes they fail. Sometimes they work.

"The system itself is a tight feedback loop" treats the system as fixed rather than something humans have repeatedly modified. The question is whether we'll add the right feedback loops fast enough, not whether adding them is metaphysically impossible.

My original point stands: the bottleneck on MCB isn't that capital won't fund it. It's that the Alameda city council didn't know a field test was happening on their waterfront and NIMBY ... people ... made noise. Governance failure, not capitalism failure.