Geoengineering oceans to absorb more CO2

This article describes private efforts to geoengineer the ocean to absorb more CO2 by dumping iron dust, which in turn stimulates more algae growth, which in turn attracts fish, whales, etc.
https://www.vox.com/the-highlight/2019/5/24/18273198/climate-change-russ-george-unilateral-geoengineering

Is this a good idea? Could it result in faster warming of the oceans and accelerate climate change by causing the oceans to warm up with more ecosystemic growth, which in turn would result in more evaporation of sea water and thus more atmospheric water vapor blanketing heat?

Could lowering atmospheric CO2 levels by stimulating the oceans to absorb more create a false sense of security that would discourage efforts at land-reforestation and reduction of CO2 emissions? In other words, would people, governments, and corporations think, "problem solved so now we can do whatever we want with the land and burn all the fossil fuels we want?"

Or could the seeding of greater ecosystemic growth in the oceans form part of a broader climate-restoration strategy that also includes energy reforms, land reforestation, land-use reforms, transformations of industrial-consumer culture, etc.?