I am the one who says that working with wet clay soil is bad. I am not going to argue, but I will not be misrepresented.
Never did I say or advocate that clay must be dry to work with.
Quoting from my treemail:
"soil must be dry enough to work with so they [people who dig] won't destroy the soil structure"
There is still plenty of moisture in "dry enough".
When the snow melts here, the clay soil is sopping wet.
I guess you will need to research it on your own to find the right answer for you.