For better or worse white house press briefings are pretty adversarial. The fawning approval of the Obama years was a bit much, but I honestly feel like what we have now is too focused on scoring points, and we the people aren't getting info that is probably useful.
That said, it IS going to be a fight in there, and I can't blame the administration for wanting to win that fight. The new secretary seems both willing and capable of delivering verbal beatings as often as needed.
Since she seems smart, capable, and good at her job, I suspect she won't last all that long. Those traits seem to lead one afoul of the CinC's temper sooner rather than later.