In jobs that require a high level of expertise, you usually want to be both a specialist (to make you worth hiring) and a generalist (to be able to do what need

In jobs that require a high level of expertise, you usually want to be both a specialist (to make you worth hiring) and a generalist (to be able to do what needs to be done). But it takes experience to get there. A lot of work in science and game development is done by relatively junior people, because both fields suffer from a high level of attrition. Those people can be specialists or generalists, but rarely both.