You do know, that ANYONE who is certified as a music teacher, meaning they have a MINIMUM of an undergrad degree in music education, is required to learn to play EVERY instrument, to at least a competent level. So every time any of us reads one of these "I can play six instruments! How about YOU?" questions, - or ones like this this that think somebody on stage who switches instruments is BRILLIANT - we gotta laugh. The big question is always "HOW WELL?" I have not touched a tuba in forty years or more. Do I remember some of the fingerings, and how to get a sound out? Sure. Am I concert-ready? No possible way. COULD I be in a couple of weeks? You bet. There are several Broadway shows that have used a format in which every singer/actor ALSO plays an instrument; then their VOCAL solo or speaking part comes put, their instrumental part drops out, and is covered in the arrangement by the other players. Patty LuPone played the tuba in Sweeney Todd. All the other players had to learn how to play their assigned instrument (maybe a few had some previous experience???) and so - they did. Are top PIT players, who are experts on that instrument, FAR better than them? You bet. But many of us in professional music have separate but parallel lives in various branches of music - and the colleagues from one branch, seldom know that we have other skills.
And ALL music majors, regardless of their major, are required in music school/conservatories to also learn piano until they can pass an exam that shows their skills. It is THAT important. Are there people who have professional singing careers, who can sit down at the piano and play the accompaniment to their songs? Sure. But again - they are not players at the level of someone whose major instrument is piano. There are SOME - Alicia Keys, Jaimie Fox - but not that many.