Every case is different and unless you know the ins and out of the personal relationship between parent and child and the personality and behaviour of each person involved, you cannot possible make a judgement.
You certainly cannot make any kind of generalised judgements about all these situations as a group.
I have never been disinherited and have no intention of disinheriting anyone, but This thread is for exploration of feelings on being disinherited... in the hope it may change some minds on GN. I am all for the exploration of feelings, some people have on this matter, mentioned in the first half of this sentence but, presumably by the second half the OP is hoping that the disinheritors will then change their minds as a result, which I think is outrageous.
The majority of those who disinherit do so after considerable thought and after having a long and difficult relationship with a child, or other expecting beneficiary. To have someone come from outside, who knows nothing about the individual cases, and then castigates their behaviour and more or less tells them what they are doing is wrong and to change it. strikes me as arrogant and insensitive behaviour.