I'd say you trying to push the blame for your **** ups on another party was cute... but then again, that's just another thing US is the best at, yes?
I already countered that about "more Italians make it more likely to be authentic." Demand tramples any authenticity. If you want to provide gold, but the only thing the local population wants to buy is steaming piles of ****, you either go out of business or swallow your cultural pride and start branding steaming piles of **** as "foreign gold." When the product goes through that US effect, the most you can compare with the real deal is whether it's still spelled the same. Of course - predictably - certain people will still try to go with "America, **** yeah" regarding everything, and argue that their steaming piles of **** are better than something they only have a twisted version of.
UK is irrelevant to this, since I'm not arguing their pizza is an actual pizza (although I'd trust them to be much better at keeping the tradition). By the same token, how often I might go to US also is, considering how many US "foreign gold" franchises have spread all over the rest of the world.