The question was whether it's a meaningful contribution to climate change. I showed with my back of the envelope calculation that it's not. I did not say that it shouldn't be done.
But that you're saving a minuscule amount of carbon still doesn't change the fact that it's feel good activism that does nothing about the real challenges, which lie in transportation, agriculture and infrastructure. These contribute to huge chunks of our emissions, are indispensable and at the same time cannot be solved simply by switching to green electricity. Every time we feel good about saving 0.03% of our emissions gives us a reason not to feel so bad about the 70% of our emissions that are the real problem for which practically anyone has not even a good idea yet.