BIOS was always a micro computer… it’s just more standardized now.
And especially things like IPMI (which is essentially a company-sanctioned backdoor to any intel server) which has a full on webserver with an unknown number of threat vectors, things like this really fall flat for security.
Just because threats are found for UEFI (an open standard), it means nothing in grand scheme of things, just that it is more observed and more easily dissected for nefariousness.
It actually is a reason to be more sceptic and evidence focused. And she should be jailed for her perjury and crime.