That’s right. The media are overblowing this minor incident and using the Watergate Saturday Night Massacre as their template.
Acting Attorney General had the option of resigning, and in fact, should have been ordered to offer resignation upon the assumption of the Presidency by Donald Trump. EVERY US Attorney needs to present a Letter of Resignation, to be accepted or not accepted, by the current President.
US Attorneys, and the Attorney General, are expected to act on behalf of the Administration legally assuming office.
No DOJ employee is indispensable. There is PLENTY of talent out there to quickly and efficiently replace every one of them.