No one spoke about identical drop. They've all dropped, their timelines might be lagging by a few days/weeks but they are all moving in the same direction in roughly the same timeline.
I believe that you made a dishonest selection of countries in your source: You selected countries with similar drops and you then inferred that measures have no impact in the virus. Germany had a ~5% drop, france about a ~60%. Germany has schools and daycare open, France closed them.
None of this is scientifically cause and effect. You are picking correlations which agree with your preferred narrative and extrapolating from there.
There is very strong evidence that the virus is less contagious to/from children and that schools and daycares are not a significant point of transmission.
What I stated was that this person selected data in a way to support their theory and that i could easily select a data point that contradicted his theory. I did not claim that my single example proved some other theory, I did not state a preferred narrative as you claim.
Please have a look at the guidelines, you should try to honestly understand my point.