While it's arguably easier to learn vocabulary as an adult, it's certainly easier to learn an accent as a youngster.
If someone is even able to communicate in a second language, they've likely already put in a whole lot of time and effort to get to that point. Yet there are a lot of armchair quarterbacks in the world (especially unilingual people, I suspect) who are happy to trivialize the efforts of immigrants who haven't reached fluency.
It makes little sense to assume there are just a bunch of lazy foreigners in the world there who enjoy punishing themselves. Learning a second language, as an adult, takes time. Learning to speak without any accent whatsoever, once the learner is middle-aged is probably impossible, aside from a savant here and there.
If someone is even able to communicate in a second language, they've likely already put in a whole lot of time and effort to get to that point. Yet there are a lot of armchair quarterbacks in the world (especially unilingual people, I suspect) who are happy to trivialize the efforts of immigrants who haven't reached fluency.
It makes little sense to assume there are just a bunch of lazy foreigners in the world there who enjoy punishing themselves. Learning a second language, as an adult, takes time. Learning to speak without any accent whatsoever, once the learner is middle-aged is probably impossible, aside from a savant here and there.