Solid angle- there’s been a ton of emphasis/focus on parasites over the past few years but nothing really about this.
Look at the theories of how ergot potentially fuelled the Salem witch hunt.
We’ve seen zombie ant fungus, that literally takes over the minds of ants, I think we’d be stupid to assume that there isn’t anything that can have atleast some impact on humans.
We also know how powerful the role of fungus can be if you believe in stoned ape theory, which I personally do to a degree.
It’s definitely possible, fungus like parasites or any other form of life has a goal of living, surviving & reproducing. It’s likely present in all of us or around us to some degree, and it’s probably under studied. Stack that with the gut-mind connection and I see a ton of merit here.