I think there's even a problem of expectations. What would it accomplish if we did that? Because there wouldn't be a reduction of climate forcing if we did this

I think there's even a problem of expectations. What would it accomplish if we did that? Because there wouldn't be a reduction of climate forcing if we did this, it would be a (slower) increase. It wouldn't cool the planet, it would merely slow the increase. Since we definitely want that to happen, we need other options than the options currently discussed. If I look at this I always come back to the same point: humanity will need to take control of earth's climate. And while limiting CO2 (and, more importantly, methane) emissions will be a component of that, it's not going to be the only one or even the most important.