Why do people keep accusing Asians that we aren't "integrated enough"?

I keep hearing this from several people telling those of us, who are first-generation Americans and the offspring of immigrants, that we are not "integrated enough". As long we speak English, become educated, and contribute to American society, why should it matter what we do on our personal time? If we prefer to be around others who are culturally like us during our personal time, what is the problem? This is not a detriment to American society or illegal. So what if we celebrate our own cultural holidays, eat our own cultural food, and only associate with our own people on our personal time? It isn't illegal nor is it harmful to American society.