I do agree to a certain extend but it also depends a lot on how much investment has gone into the operation. If you have to invest in a quad for extraction, a dozen hightseats and a chiller back at home then it's going to set you back north of £20k before you've shot a deer. Versus free use of someone else's facilities and an easy route to dispose of as many carcasses as you need. Which shouldn't be underestimated for larger deer.
I'm playing Devil's advocate to a degree but there is a counter argument here that a professional larder installed and properly maintained by an estate, with onward refrigerated transport to the gamedealer before being cut and packed by a professional butcher in an inspected premesis is "better for the image of stalking and deer" than a "Fred in a shed" operation with an old coke fridge in the corner of a garage and some freezer bags labelled with marker pen...