I have a CS degree .. and I find it more difficult to write good requirements and come up with good design (since people are generally changing the requirements

I have a CS degree .. and I find it more difficult to write good requirements and come up with good design (since people are generally changing the requirements and the design should be flexible) prior to programming than to solve some problem on a whiteboard. I decided to not to do any whiteboard challenges unless the whiteboard has a built in editor, search engine and stack overflow. So far people who interviewed me just wanted to know about the different projects that I worked on during the last 15 years. I'm lazy and don't have time to prepare for interviews or do home assignments because of family life. I'm going to be frank about this if I'm asked to do anything more than talking during an interview.