'other countries' would not even developed the drug...Vertex, a US pharma company, developed Trikafta. No one is paying the 300k out of pocket. The high price incentivizes research. Expensive drugs seems like a tradeoff for more innovation.
I literally just received a box of Trikafta on Wednesday. My copay was $150 on a $31,855 retail price. (I actually don't pay the $150, due to Vertex's copay assistance)