Indeed, specialization has benefits or mastering a niche and collectively growing better as opposed to trying to be a jack of all trades. But there is no reason more than one specialty can't be adopted, or even other things learned that aren't a particular specialty developed as much as others. Understanding more allows greater understanding in general or often of the specifics themselves. Narrow specialization is never a good thing. That's how compartmentalization works. Other can manipulate us by compartmentalizing aspects of reality. We can fool ourselves as well.

Check out this post recently that counters the other side for the need to have general wide knowledge.

“A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.”
― Robert A. Heinlein