> We really don't need to import any kind of engineers from outside

I was involved in a startup in the Netherlands. We tried to recruit Dutch people, all wanted safe 9-5 jobs where they would know what they would do in 1-2 years. A startup can not guarantee that.

We ended up with most engineers foreigners, many (but not all) that have studied there.

So I would say that it is also risk and opportunity related. Someone "from outside" will be willing to do more, will have to prove himself, will take more risk. A "local" will have family support, wealth, a network, might want and value stability.

I don't have an opinion about how things "should be", I am just sharing how I saw them (myself an immigrant, multiple times)