Your are changing the basis of this discussion and pivoting on your argument. No one has ever said that dacs are perfect or that components within are perfect so that is not what was being discussed here.
Yes, nothing is perfect, and we have no way of knowing the extent to which what makes a DAC "imperfect" has an impact on sound quality. So this is completely "on topic".
A conversion error on a single sample (or on a single bit within a sample) will result in a completely different output frequency. That's not something you experience with analog...
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