Specialists need to be trained or train themselves. This is only really achieved by on the job training or very in depth courses. So ultimately, you would hire

Specialists need to be trained or train themselves. This is only really achieved by on the job training or very in depth courses. So ultimately, you would hire good generalists and get them trained on the job to specialize in the field. Nobody is born a specialist. Universities do produce some but it's research, not the same as development and deployment. And you need generalists as well as multiple field specialists to not get locked in a quibble over comma or a comfortable but overcomplicated and bad solution.