> Start that argument once we can model insect brains.

I'm not sure what level of modelling you'd accept, but we appear to be close:

https://pubmed.ncbi.nlm.nih.gov/32880371/

> Mouse brains aren't even on the horizon of what we can do.

I would say that they are "on the horizon", given that the mouse brain connectome has already been published:

https://advances.sciencemag.org/content/6/51/eabb7187