I'm fairly sure all the first three points are true for each new human produced. The environmental cost vs output is probably significantly higher per human, and the population continues to grow.

My experience with large companies (especially American Tech) is that they always try and deliver the product as cheap as possible, are usually evil and never cared about social impacts. And HN has been steadily complaining about the lowering of quality of search results for at least a decade.

I think your points are probably a fair snapshot of peoples moral issue, but I think they're also fairly weak when you view them in the context of how these types of companies have operated for decades. I suspect people are worried for their jobs and cling to a reasonable sounding morality point so they don't have to admit that.