The UI designers I had worked with do not have much experience working with the web platform as a user or developer, are not aware of capabilities default contr

The UI designers I had worked with do not have much experience working with the web platform as a user or developer, are not aware of capabilities default controls provide and almost never use the products they've designed. Additional exposure of UI compared to under-the-hood stuff begs for additional bikeshedding and micromanagement by people who understand this even less, like management. Maybe I never met good a designer or worked in a company with sane process.