Ou Mo was only half-joking.
Being a secretary involves managing and learning a lot of things. Especially being Ou Mo's secretary, it's like being a walking machine.
It's too tiring.
Others might be able, but she can't.
Although being a secretary would mean seeing her often, he still can't bear to see her suffer so much.
After all, she is his beloved wife.
Another point is that small companies usually prefer to hire relatives or acquaintances for financial positions.
Big companies, on the other hand, dismiss such practices.
Instead, they prefer to hire unfamiliar, competent, and capable people.
A company, well, if there are too many family members, it tends to be chaotic and difficult to manage.
Ou Mo made Lin You the finance manager to fulfill her desire to help him.
On the other hand, by making her in charge of finances, he could assign a few assistants to her, and she would just need to sign documents and the like.