Eh i agree but i wouldn't phrase it like that....or else idiots start pedaling the natural gut remedies. From the studies I've seen yes they can explain it by gut biome yes.....but more so a dysfunctional or active gene that produces extra or not enough of something in the gut... similar things have been detected for lots of psychosis and genes that don't produce serotonin, it is an interesting field.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7226078/