But available labor is available labor, for new businesses. I don't understand why people sit around saying oh the minimum wage is going to increase unemployme

But available labor is available labor, for new businesses. I don't understand why people sit around saying oh the minimum wage is going to increase unemployment and therefore treat minimum wage legislation as apostasy, but some radical new technology which results in a lot of unemployment is just the economy getting more efficient and it will absorb all the excess labor with new enterprises. Is there something about minimum wage legislation that makes the labor completely unusable? Wouldn't it be equally as temporary as some large efficiency gain in the economy?