I wonder if there isn’t an aspect of the how to, of if one should, answer leading compound questions. The old “Have you stopped beating your wife?” type questions. It’s not that one cannot answer but in answering there is the risk of indicating the unasked question/unstated assumption is in fact true (The person has beaten his wife in the past.)
I’m not sure just how the situation might fit into the separating-pooling equilibria framing but seems to have some similarities. For someone to say they cannot trust me I think two extremes might be, making the assumption I am honest and trustworthy, they know nothing about me or they think something false about me. In the first case being offended by someone saying they cannot trust me. Caution is reasonable here.
In the other case, arguing that I am trustworthy is not the right approach and before ever making such a claim identifying why the person thinks there are reasons not to trust should be identified and cleared up—at which point might feel slighted if all the reasons they were not viewed as trustworthy were should to be false and they may well be justified in protesting further statements of untrustworthiness.
I would see a few things to consider before selling everything now. First, when are is the debt due? If there is no concerns about default and the time is still within the person’s planned holding period I could see an argument for scaling back some but not just exiting.
Second, what are the income needs. If the current rate is still generating the level of income desired then again, I don’t see the strong case for closing out the holdings now.
Third, if the holders are shifting their focus to maximizing returns rather than stabilized income and capital preservation then the dumping everything and investing later to get that 20% or more rate makes some sense but recognize it for what it is, a change in investment approach and a shift in the risk exposure.
Last, somewhat related to the holding period, most of these investors probably have some type of targeted duration and ladder structure in their debt holding. Might make sense to adjust the portfolio duration but they will likely enjoy most of the gains and avoid most of the real losses you see as holding mature and get rolled over into new debt.