If you read
her testimony before the senate, she does say that the developers need to realize that
they have fiduciary responsibilities in that they must be acting for the greater good of those who use their code to create crypto coins.
To me that is a very valid point and in my opinion the devs behind Bitcoin Core do that.
Fiduciary duty is a tricky thing with multiple perspectives. From the business community’s perspective at the time the developers did not do their duty with regards to limiting transactions with a blocksize limit that rendered many Bitcoin businesses unable to continue their business models.
I think in this case she’s referring to fiduciary duty to those that use their code from her perspective of making sure proper laws and regulations are forcibly adhered to.