This is reveals a gross misunderstanding of Catholic doctrine. The Church does not create saints or decide who is or is not a saint. It only recognizes individuals worthy of veneration and emulation because of their lives, contributions and sacrifices. It is not an inerrant practice.
Peace be with you.
“It is not an inerrant practice.”
Even worse, it distorts the word “saint” that God Himself applies multiple times to every single believer. It adds qualifications God Himself does not add.
Clearly, it is not inerrant.
For the record, I hope the dear man was a saint.