This seems like quite a fundamental misunderstanding. At least the kind of buddhism I practice, you never disconnect or “no longer feel guilt” or anything like this. Yeah, during Zazen we sit in equanimity with such feelings, but that’s very different to living that way all the time (which is impossible unless you’re some kind of psycho to begin with).

I'm wondering though if that is really a necessary consequence of non-spiritual meditation practice. There is fine line between meditation and autogenic training style self-hypnosis internalizing convenient messages. So, if a practitioner starts to go down that route all bets are off. OTOH it is true that social norms become less relevant with meditation. For one because meditation makes you strong and social norms are backed up by guilt dynamics which don't work well on actually self-confident people. Also social norms are constructs and you start to look through those instead of thinking they are actually real. But I have some slight feeling that this might as well open up a path to real and authentic moral attitude and personal ethics. Those simply might not be so convenient and easily manipulated and by that seem somewhat frightening to some people.