Leaving the "Politics" aside....
There's a few good reasons to buy American guns.
First,warranty work is closer. After some frustrating experiences with a Spanish handgun long ago, I know that guns shipped long distances are more likely to go astray.
Second, shotguns from the Big Three have great parts availability, and gunsmiths that can work on a Mossie are neither as rare nor as expensive as those that can give a Purdey its due.Aftermarket accessories is a marvelous way to upgrade one's equipment.Clones do not have this capability.
Third, many used specimens of modern pumps are for sale at reasonable prices. $200 will get one a beater 1300, 500 or 870 that looks a bit rough, but will function perfectly for decades.
5000 rounds through a 1200,1300 or 500 series is just part of its working life. Same rounds through an 870 are just a good start. My hunch is the clones would have given up well before this.
And, 5000 rounds is less than a year's worth of shooting for some of us, and a few years worth for many more....