Veronica could accept that her mother only chose to pass on a significant portion of her extensive knowledge to Helena.
That did not mean she was pleased with the difference in treatment.
The Cyborg Cat accepted the logic of Cynthia's explanation. She even agreed with her mother's argument to an extent.
Veronica saw herself as a mech designer first and foremost. Since she was so committed to this career, it was best if she was able to develop her own insights and solutions. Giving her lots of knowledge related to qi cultivation would distract him and cause him to deviate too much from the mentality of a mech designer.
As a powerful qi cultivator herself, the Oblivion Empress deeply understood the taboos related to contamination and forced inheritance. She took special care to prevent Ves from unintentionally following her path when Veronica was not suitable for her approach.
It made sense for Helena to learn from their mother.