There are mostly disadvantages to getting ill. If you’re feeling particularly bad, there are scary (scarily expensive) doctor or hospital visits. But usually, it’s just a drawn out discomfort that leaves you disoriented and dazed.
There’s an advantage for artists: it can help you see in new ways and think new thoughts. They may not be coherent thoughts, but any chance to break out of patterns and routines of thinking is good. Try to write things down or sketch ideas. Usually, you’re too weak or uncoordinated to do real work, but getting the gist on paper (digital paper, too) can help you see different ways to make things when you feel better.