I agree with you. There is a lot of bad design and there are a lot of bad designers. Privately I tend to call design that doesn't conaider function styling and

I agree with you. There is a lot of bad design and there are a lot of bad designers. Privately I tend to call design that doesn't conaider function styling and people who make these decisions are stylists. That being said designing for screens is already hard because the sizes and proportions of the screens and windows can vary wildly and even change during use. Adding potentially different fonts with wildly different widths and readability into the mix is certainly something that doesn't make things easier. Again, that doesn't mean using a system font is something I'd never do, it just means that whether that is a smart or a bad choice depends on all kind of factors.