During his studies and very early career? That's completely normal and I don't understand why more people don't do it.
Studies don't give you any idea of what a job is actually like. They also don't give you a reliable indication that you'll like a field. Choosing bio out of high school, then moving to CS for any reason, then trying a few jobs using these skills is a normal and healthy way of searching for a job he really likes.
Studies don't give you any idea of what a job is actually like. They also don't give you a reliable indication that you'll like a field. Choosing bio out of high school, then moving to CS for any reason, then trying a few jobs using these skills is a normal and healthy way of searching for a job he really likes.