Would you rather spend the 10,000 to capture 1 ton of carbon or instead pay 10 factories to reduce their output 10 tons each.

We can make it a concrete example.

Build a nuclear plant first.

Alternative 1: use the nuke plant to do carbon capture from the atmosphere while next door ten coal plants run and pollute as before.

Alternative 2: produce electricity so all the ten coal plants stay off.

The latter approach has about 10x the CO2 reduction effect.