It should be noted that Fortescue Metals is not some disinterested third party here. They have a massive stake in green hydrogen production (see their FFI division).

Hydrocarbons (not necessarily from fossil fuels, see https://prometheusfuels.com/) + DAC are one proposed alternative to green hydrogen for powering industries (such as mining) where batteries are not a good option. I know experts who believe this is more viable.

I still agree with him that DAC can't be used as an excuse to keep emitting.