Right. But OP's question isn't "do you need a chef?" the question OP posed is more akin to "why should chefs use knives when they have blenders?" or "why should

Right. But OP's question isn't "do you need a chef?" the question OP posed is more akin to "why should chefs use knives when they have blenders?" or "why should I build an IKEA bookshelf myself when I can hire a contractor to build a house?" Because they're two different tools and situations.