Look at anything next to you. Your phone, your shoes, a calculator, a TV, a sink, etc. All of that required a designer to design what the product would look like. It required QA to make sure it's what people wanted in a product. It then required a marketing team to sell the product.

A world without these people would basically be a world with shitty user interfaces with objects that have zero style. Hello yes, that's a nice burlap bag you're wearing today. I think it goes rather well with those wood blocks with string that you're wearing on your feet. Hold on, I need to make a phone call, let me just break out this circuitry board and push these two wires together at different timed intervals to place a call.