I'm not sure why people don't see the problem with "I don't want any price regulation in the US, but I want to personally benefit from price regulation done in other countries". It's a whole different level of selfishness.
Can you describe how selfishness comes into play? I want everyone to be able to purchase at the lowest price and don't want them to be limited to buying only from the US.
Because they are voting for no regulation and no M4A in their own country, while eating off the plate of countries that do negotiate drug prices and have socialized healthcare.