This will inevitably lead the most competent and busy people to not share their assessments of anything, since they will be met with the expectation of having to justify every assessment in detail, which is simply not workable in terms of time.
See some of the nuance Davis gives in other comment threads on this post that I think address your concerns, but I think this is on net beneficial if we also cause them to not share their assessment either way without explanation. Just because someone is competent or busy doesn’t make their assessments that much more useful unless they actually take the time to make a thoughtful assessment, and I expect the amount their gut reactions to things will be not much better than anyone else’s, caveat being there is probably some appropriate discount function on which their gut assessments are marginally more useful but the discount rate is so high we might as well just ignore it. Put another way, being competent, busy, or an expert doesn’t make you less likely to do the things humans tend to do that lead to low-value judgements (cf. literally everything written about decision under uncertainty in humans) outside of limited contexts with training and rapid feedback, so in most places at most times having this norm is useful.
I’ll also point out this already is the norm in in-person conversation where the only way to express pleasure/displeasure with someone or what they are saying is to do so in a way that opens you up to being asked for justification and failure to provide justification can result in dramatic discounting of your position. Or so the norm seems to be to me.
See some of the nuance Davis gives in other comment threads on this post that I think address your concerns, but I think this is on net beneficial if we also cause them to not share their assessment either way without explanation. Just because someone is competent or busy doesn’t make their assessments that much more useful unless they actually take the time to make a thoughtful assessment, and I expect the amount their gut reactions to things will be not much better than anyone else’s, caveat being there is probably some appropriate discount function on which their gut assessments are marginally more useful but the discount rate is so high we might as well just ignore it. Put another way, being competent, busy, or an expert doesn’t make you less likely to do the things humans tend to do that lead to low-value judgements (cf. literally everything written about decision under uncertainty in humans) outside of limited contexts with training and rapid feedback, so in most places at most times having this norm is useful.
I’ll also point out this already is the norm in in-person conversation where the only way to express pleasure/displeasure with someone or what they are saying is to do so in a way that opens you up to being asked for justification and failure to provide justification can result in dramatic discounting of your position. Or so the norm seems to be to me.