Agreed - for example I now have Mast Cell Activation Syndrome which can explain a lot of my symtpoms but the root cause is an epigentic and/or change to methylation cause by SSRI. That is what triggered the MCAS which then caused many symptoms. So the theory of viruses or pathogens is not the root cause - they are just in addtiion. Many people have gut issues and viruses and lyme and EBV and bacterial infections but it doesnt manefest in exactly the types of symptoms PSSD/PFS/PAS does.
Also, the timing doesnt make sense either- why would pathogens and viruses be the cause when my penis turned numb after taking a drug?