Knowledge requires justificaiton. A TLGH that understands epssiemology wouild see itslef as not knowing its TLG, since "it was hardwired into me" is no justification. This applies to humans: we are capable of dounting that our evolutionarily derived moral attitudes arre the correct ones.

This only applies to humans because we are not TLGHs. Beliefs and goals require justification because we might change them. Beliefs and goals which are hardwired do not require justification; they must be taken as given. As far as I'm aware, humans only ever have beliefs or goals that seem hardwired in this sense in the case of damage, like people with Capgras delusion.

However, that would be subject to the Open Question objection: we can ask of our inherited morality whether it is actually right. (Unrelatedly, we are probably not determined to follow it, since we can overcome strong evolutionary imperatives in, for instance, voluntary celibacy).

In fact, I would argue that we can only genuinely ask if our "inherited morality" is right because we are not determined to follow it.