The only problem with this analysis is that in practice a lot of the designers don't understand the customer and don't understand the business. Don't understand the market, at least compared to the founders or people who've been in the space for a long time. So there's a bit of a false confidence where the designers think they know what's really right because they did "scientific approach". But in reality the founder…
"in practice"? Disrespectful, of course, but also not true. In practice, most designers know what they are doing as well as you know your job. If yours doesn't, you hired a quack. Here. Try this, in practice, most business owners don't know what they are doing. In practice, most programmers write shit. It's easy to bitch at artists because most people don't understand what they do. Don't be one of those people.
If you hire an architect to redo your house, it's fine to say "I see where you're going with this thing for my kids, but I know them and they will never go for it."