We have various sectors in our model, but only one single pool in the labour market. That is because, dealing with a global model, which is different than dealing with a country model, the amount of data and calculation time that would be required to split the total employment into winners and losers, as you suggest, would be irreconcilable.
That is indeed a partial limitation of our model. At the same time, it gives us the great advantage of seeing the aggregate picture, which is where we can look at a global model.