What I mean is "good looking GUIs" , as a dev when I create a basic tool , something that are not for customers to see and complain about I don't care about fon

What I mean is "good looking GUIs" , as a dev when I create a basic tool , something that are not for customers to see and complain about I don't care about fonts,paddings, "professional looking design" , you get your buttons and inputs and job is done. The tool I use daily for making money is Intellij, I don't f* care that the menus and buttons do not match my DEs, I would also prefer programs that use the system defaults rather then try to implement a better theming with custom buttons,colors and whatever some designer with big ego thinks is cool today(I can't understand why they like slim fonts with low contrast colors)