"Having a say" is very different to being a dictator. A good designer understands that design is a discussion and that there will always be pragmatic compromis

"Having a say" is very different to being a dictator. A good designer understands that design is a discussion and that there will always be pragmatic compromises to be made. However, having the implementer make the important design decisions about a user interface is nearly always the wrong thing to do. The implementor knows too much about the implementation to see it the problem like a user would. It is this which causes UI's that look like database tables when they should resemble faces and buckets and controls that mould to engines rather than fingers. It is not the implementors' fault. They are just to close to the metal and too far from the users.