Originally the course copy interface had all content selected by default and it was awful.
Faculty would accidentally not change it to select content and get a full course copy at the worst times.
At some point it was changed, so neither all/pick items were selected by default.
The recent interface change again reverted back to having the "all content" selection by default.
Can we just not?
I can't think of a single good reason this behavior exists again and many reasons why it shouldn't.