Not in agreement with you there. There are changes, sometimes dramatic, when you dismiss or early retire personnel which happened many times under Obama's 8 years.
When Biden took office, new leadership sets the tone and priorities even in the thickest of bureaucracies. Should you review testimonies by Austin and Milley in front of Congress prior to the Afgh. withdrawal, you might think otherwise. In a nutshell, climate change, "Countering Extremists Working Group", and diversity were to be major points of focus. Later on, unvaxx'ed personnel. If you think this doesn't matter to military personnel, or morale, or that the Afgh withdrawal is not relevant, well again we disagree.
A properly run military should be always focused on training for combat so they can kill the enemy. If they get called in to do so that's the job.