Both if you consider corrupt govermets as countries, educated and productive people feel entitled to rights, if you import people you can produce for your mansion(you and friends) and your army while your population is dieing of hunger, useless hunger people don't have the capacity too fight for their rights. For the corporations sites mean you can have 0 consideration for the negative impacts in the ecosystem, and cheap unskilled labor if you need it.

Manñy countries who have petroluim and prefer import few skill people than treat their own populations as humans

Tesla is not as develop as something for 20 years ago, yes you can make good thinks about the design but isn't groundbreaking nor look like something new, yes is important development speed but is important to understand the difrerence in new features and already solved ones the later take months or years but the first takes years or decades becouse they expanded the knowledge, not becouse of the production process was slow.