The subsidy was to incentivize adoption of technology to fight climate change. As a result, he took actions that reduced CO2 emissions, which everyone benefits from.
"we" overpaid for the climate benefit you want, can't you see that? We could have got the climate benefit cheaper, which would give us a bigger budget for more climate benefits.
Instead of him saying "for net zero cost, I've reduced my carbon footprint, which is great!" he's crowing about "I don't pay anything any more!" That is a private benefit that he loves, that we paid for, and we do not benefit from.
