Should musicians be able to play at least one musical instrument?

No. I was a keyboard player in a band in Junior high school. Our singers didn't play instruments, but one had appeared on "Star Search" (this was 1983).

She apparently even released one album.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.