Agreed, almost every profession has advanced to the point where they require specialization. Everything has become so complex that being a jack of all trades means you fail at them all. Even trade skills have specialization: carpenters specialize in framing or cabinetry or furniture, mechanics specialize in specific machines or sub-systems like engines or transmissions, etc.

But it seems most of the people responsible for filling these positions haven’t realized this yet or don’t know enough about the jobs they are hiring for.