america is so fucking based man
in any proper country that company at least gets forced to pay by the government then ordered to shut down forever due to wanton cruelty. all the employees get generous severance except whoever made that call. depending upon your view of carceral punishment there are a few ways to go with that guy.
It doesn’t cost that much because the company are making a hefty profit, of course. And much more profit off it in the US as per usual, the NHS pays considerably less
But profiteering aside, the number in the final paragraph is your answer. Up to 80 kids in the UK per year, so up to ~400 in the US, ~500 for the EU. It’s not a big market but the cost of drug development doesn’t get cheaper just because the number of cases is small, it gets more difficult and more costly. And there’s more than one drug company chasing the market.
None of that is a defence of Pharma. But it is inevitable under capitalism. Eat the rich etc etc.