Fishing is one of the random "daily activities" that could come up. Also it can produce "eureka" moments required to advance. I thought fish could be used in a serum but I was wrong.
Science career uses at least 6 different skills. The most important being gardening as you will need tons of plants for serums, nets eureka moments, and comes up as a daily. I don't think you can be a scientist without someone tending a garden for ingredients at least not easily. You will be required to use socials so Charisma will raise but is not remotely needed. Fishing is useful but can be worked around, but again when the daily activity fish for 20 minutes it nets eureka moments. Building a rocket, and space missions comes up as dailies so rocket science is going to be gained plus both of those actives can net a eureka moment. Activities that build logic are common daily requirements, plus many of them can earn you a eureka moment. Handiness is quite useful given your required equipment breaks down and tinkering gains eureka moments.
Plus as a scientist you will need a large collection of crystals, metals, DNA, fruit, flowers, plant slides, and more for inventions and serums so collecting is required.
It is the most varied career in the game plus given the usefulness of some of the inventions and serums it also has the most utility of the professions and it has a live and rabbit hole mode makes it my favorite. All my sims "retire" to that career after they do the ones required for aspirations. Plus it is easy to make some side money as a scientist using the cloning device and sim ray. And it involves aliens. As I said I like aliens.