Explanation

According to

logger_warning is advertised to allow overwriting, but doing so proves to be more complicated than expected.

There basically are two reasons for this:

1. The implementation is located at pypdf._utils.logger_warning, which usually marks an internal implementation and thus I would not assume this to be future-proof.
2. The method usually is imported directly, as can be seen in

   pypdf/pypdf/filters.py

   Line 46 in 11ee648

   logger_warning,

   for example. This requires patching each import separately.