Thats the problem with modern match fishing- as specimen anglers targetting carp we as a whole, barring a percentage as ever, tend to give our quarry some tlc when we catch them.
'Hardcore' match anglers however merely see the poor f1 types thrown into a farmers would be swimming pool known loosely as a fishery as a potential cash payout. Speed is the key factor, not fish care. Believe it or not, what you've seen on tv is an improvement on what used to go on- hundreds of pounds of carp were crammed into inadequate sized keepnets on hot days to suffer damage or worse...
Nowadays many fisheries show a modicum of concern for their stock, probably due to the rising costs of replacing 'fodder' for the next days match.
The problem with commercial carp fisheries is that the species, ie carp, put up a good scrap when hooked. Great if you're pleasure fishing on a rod n line, not so when you're in a rush to land the fish and put back out for the next bite. Because of this, matchmen have a tendancy to 'skull' the carp in which is hardly beneficial, but a lively four pounder once netted stands a very good chance of flapping and being dropped.
A 4oz roach however is a different subject-general coarse fish don't fight as hard, therefore come in quicker and behave more whilst being unhooked. But come winter time your local canal will be harder than a coffin nail to get results on, whereas the overstocked venues such as Crudmore offer good 'sport' all year round. This obviously appeals to matchmen more hence their popularity.
I think fishing for bigger fish with a pole during matches should be outlawed personally, fish care and matches hardly go hand in hand on many waters. But I guess thats the price the poor carp have to pay for becoming so darned popular...
I bet the roach n perch love the lack of attention though...