I like to consider humanity-AI alignment in light of brain-brain alignment. If the purpose of alignment is self-preservation at the simple scale and fulfilment of individual desires at the complex scale, then brain-brain alignment hasn't faired greatly. While we as a species are still around, our track record is severely blemished.
Another scale of alignment to consider is the alignment of a single brain with itself. The brain given to us by natural selection is not perfect, despite being in near instantaneous communication with itself (as opposed to ...
Shorthand and cryptophasia (the tendency for twins to develop an idiosyncratic language in isolation) are very visible examples of this.