Many aspiring scientists view their lack of experience as a problem to be solved.
But as this case shows, inexperience can be an asset. Not being entirely convinced of what's impossible is a critical component of making discoveries. The longer you're in a field, the harder it is to maintain skepticism about the impossible.
Edit: New method called VSDT (Visual Schema Displacement Therapy) developed by
Nik en Eva Speakman, validated by Suzy Matthijssen
Source (NL): https://eenvandaag.avrotros.nl/item/nieuwe-oogknippertherapi...
See oft-posted example of George Dantzig: arrived to a lecture late and assumed problems written on the board were homework. He proceeded to solve them, and only discovered afterwards that they were open/unsolved problems in the field of statistical theory.
Her mention of the lack of a mechanism for how microbiome influences the brain is, I think, sufficient reason to keep this germinal fact in mind.