It's totally true, and I agree with Lady McC that following the rules is the safest option. Drug withdrawal times for meat are clear; what nobody wants to consider is that eggs are not meat!
This is one very important reason why keeping a closed flock and being careful about biosecurity is so important! Healthy flocks have very limited need for meds!
This is also why, if we want changes, we need to find a way to fund research directed at small flock issues, and meds for treating injured birds, as an example.
And/or, we eat treated birds and their eggs at home and don't offer them to anyone else.
Mary