Of course, it depends on what type of fishing and what type of water a person enjoys. And a standard answer would be "it's all down to individual choice". There's a lot of truth in that, but there are, nonetheless, a number of ways in which the carp/commercial explosion impacts on anglers who would choose, as far as possible, something different.
Some general fisheries with previously well-balanced stocks have been thrown right out of kilter by the short-sighted introduction of a stock of carp. Rapidly growing to a size that over-powers the tackle needed for the other species, they come to feed intended for other fish, smash your gear and trash your swim. Several club ponds I used to fish are now ruled out, for me, by the dominance of carp.
In terms of the availability of fishing gear, while some will argue that carp have saved the tackle industry, my experience has been that manufacturers catering to the dominant commercial styles produce less and less of the kind of rods that I'd be interested in owning.
More abstractly, my feeling is that the more "steroidal" model of fishing that's grown around carp commercials - bigger fish and bigger hauls, heavier tackle, more brutal methods exploiting fish driven to compete by stocking density, more soulless environment designed for convenience and easy results etc etc - will change the way fishing is conceived and practised.
I also think, just my opinion of course, that the allure of the carp-based commercial has resulted in fewer anglers being bothered about the condition of "public" waters such as our rivers, and in fewer buying into the clubs which play a role in maintaining and being "watchdog" for natural fisheries.
I'm thinking mainly of the role of carp in general coarse fisheries - bagging up with stockies , as the lingo goes. I recognise that trying to catch big carp from challenging waters is as skilful and interesting as any form of angling. And it's not the carp's fault - it's the way we are using carp as a commodity in the fishing business of today.