Factorization could have number theory implications I suppose. Using quantum effects to break cryptography wouldn't have any real long term advantages unless you aspired to be some sort of a supervillain.
If you want O($10 billion per year) of funding, those numbers can only come from having $10 billion a year of impact balanced against your chance of success. The only application of QC worth $100+ billion is breaking cryptography.
PQC is as much a tool to reduce funding for QC as it is a tool against an actual eventual quantum computer.
