To me it is far less philosophical and much more practical.
There are times when the nests are clean and the eggs are retrieved in spotless condition. I don't wash those. But sometimes out in the breeding pens, there are muddy days and days with far, far less than clean eggs, filthy even.
During hatching season, I'm sure not going to discard dirty eggs. A quick rinse and air dry and I set those eggs that once were dirty. It doesn't seem to negatively effect the hatch rate, and may even improve it a bit.
I don't think any of this matters. Do what works for you and warms your heart.
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