Is the tech industry really that influential for job growth in America? Say everything Cuban says is true, wouldn't there only be a marginal difference between

Is the tech industry really that influential for job growth in America? Say everything Cuban says is true, wouldn't there only be a marginal difference between today and his tomorrow? Aren't the majority of unemployed non-tech specialists? It isn't clear to me why money lying around necessarily entails job growth in the tech industry, especially for larger software firms but even smaller ones. But again, I feel this would only be marginal contribution to the job situation were it the case.