It's not really a misconception, this was Feuerbach's and also Nietzsche's or Stirner's criticism of Christianity. It projects human attributes on an ostensibly divine subject "othering" and worshipping them, in reality just attempting to sanctify humanity. (in Stirner's words creating Mensch (human/mankind) with a capital M". This is incredibly obvious in the psychology underpinning a lot of Christian beliefs, the Manichaean good and evil worldview, the meek inheriting the earth, the day of judgement, equality, immortality i.e. trying to escape death, and so on.

It is at least historically important to note that at least Nietzsche and Stirner were reacting to Protestantism as expressed in "modern" Germany.

I'm not trying to make a "No True Christian" argument but rather just want to assert that reform does happen both for good and ill. Luther's original reform, in part, was to point out that political concerns within the church were overriding the spiritual concerns of the laity. He wanted to refocus faith on a personal relationship with God. One major criticism of that refocus is that it caused individuals to become over-focused on the self instead of God (as embodied in the institution of the church).

In both cases you could argue that the principle problem is when the focus of faith is something in the world (either the church or the individual). So I think it is perhaps too far to say that "we have always been worshipping ourselves" when the criticisms within and without the church are pointing that out as the problem that triggers the reform.

That is, both Luther and Stirner can be correct in their criticism of religious institutions. There is more than one way to get it wrong.

Exactly, this is alienation. Marx went on to describe the emergence of capital in history as another form of alienation.

It's funny to see the Vatican reusing the Feuerbach thesis about humanity creating the idea of God and then becoming slaves of that idea to talk about AI, as they are the gatekeepers of the original Artificial Idea called God :)

But also in this text we can feel the idea of the human soul and free-will crumbling, that also are the core of secular humanism.

Marxist analysis is also challenged, as we can speculate that AI would make the organic composition of capital to go to the roof... but you can really talk about OCC in regards of singularity AIs resembling more the Aladdin lamp or the Green Lantern ring than a highly automated factory, without even mentioning the possibility of an agency on their own?