I’m not sure that’s true if your objective is population control, habitat maintenance or commercial venison production. In all of these, the largest expense will be labour, so that needs to be minimised. Man hours is absolutely critical in any operation that needs to work to a budget or generate a profit. Most available data indicate that the only deer stalking that currently generates enough revenue to cover the cost of the manpower involved is trophy stag/buck stalking, where the trophy attracts additional fees. Contract culling and the other forms of non-trophy stalking that require paying the stalker all run at a substantial loss to whoever is paying, precisely because they have to pay whoever is doing it enough to make it worth their while.
The continental driven hunt system works because (1) it is largely recreational, with most involved not billing for their time; (2) because deer density is mostly substantially lower than it is here; (3) because there is a far higher proportion of state owned land, and (4) because it’s centralised and controlled by the state in a way that we would find unacceptable. It also relies on having mass logistics in place to support it all - in a way that is simply not economically viable in the remoter parts of Scotland.
It is a system that works given the particular traditions, land ownership patterns and laws in the area. To move from what we have to a continental system would require a fundamental change to the law and to cultural attitudes. It’s actually not far off the philosophy underlying what NatureScot are attempting with their DMNROs - and look how well that’s going down.