If a company is swimming in money, whether it's from investors or revenue, then yes, hiring people to handle specialized jobs is definitely the best thing to do

If a company is swimming in money, whether it's from investors or revenue, then yes, hiring people to handle specialized jobs is definitely the best thing to do. But there's always a point at the beginning where a company doesn't have a ton of money laying around, and at that stage, I think your advice is bad. It's better to have those jobs getting done poorly than to have them not being done at all.