Those complexities seem to be central to how you view graduate degree holders as less trustworthy. From what I understand, you're stating that these institutions are not trustworthy for some reason, which seems to be that they are trying to hide something that is true. Could you elaborate on that?
More or less comes down to trust in institutions and whether or not you think trust should be earned not given. I've seen (personally and in the news) way too many occurrences of trust being abused by institutions. My default is the more political an issue is, the more likely I am to have 0 trust.
I've got a much higher relative trust in underwater basketweaving PHD's than virologist PHD's commenting on the lab leak.