Why:

I went to Alexander Huth's talk on brain decoding and he seems to think internal monologues are the norm and no monologue is a fluke. I think the opposite, and that thinking that monologues are the default is because he (and i) mostly associate with people who have such a monologue (or are the type to break the monologue through hardcore meditation).

I will judge what 'representative' and 'minimal' mean, in good faith. Study in hundreds or thousands with good experimental setup will probably qualify.