Hello :) that is a great topic to discuss!
I think there are both good and bad things in only being encouraged to integrate and also both good and bad things in being forced to integrate.

As an immigrant myself, coming to Germany I was forced to Integrate into German culture. My brother and I were sent to an intensive german program where we learned the language in 6 months before being sent to german schools.
Getting to german school was either integrate culturally or die (you know highschool), also the schools system was completely different, if we wanted to graduate we HAD to adapt.

This was good because now, 5 years later, I speak fluent german and genuinely like german culture (in general) it has a way of making me feel kind of at home.

That being said, the argument you mentioned of now there being small communities so people don't HAVE to integrate to a new culture makes a lot of sense, and I have also seen very closely how people around me (and close friends) live that way.

Having the possibility of finding a community you belong to in another country is priceless and probably makes life at the moment way easier. But then because people are so comfortable they will never go out of their way to actually expand their knowledge learning a new language or interacting with another culture. I think that is a real shame.

But then again there isn't always a community you belong at, and even if there were, chances are not every person can afford international schools (which are very pricy). So then again in the end you are forced to integrate.