The bolded sentence is the crux of this for me. You can't treat everyone the same because not everyone is the same. Some respond to a firm approach and need it to keep them in the right mindset, some need more encouragement and assistance. This is good management, and trying to force a particular viewpoint or mindest on someone that can't handle it can be very unfair on that individual. It isn't 'being weak' it is not being supported correctly.
I don't know the facts here of course, and will also await any investigation outcomes before making any assumptions that something like this is more or less the KMac situation.