I have no problems saying it is a factor amongst many others, and also believe that multiculturalism brings benefits of its own as well.
But I'm sure you have met children and parents of immigrants who want to get as best an education as they can and want to learn and get on in life. My experience is second hand from my niece who is headteacher in an inner city (Hackney) primary school.
Pluses and minuses. I am so minded, as I read upthread, that although of course she of us have encountered medical staff whose English was not adequate, we rely on huge numbers of staff in the NHS whose English is perfectly adequate, and not only that, when we were going through Covid a higher % of BAME staff died whist caring for the population as a whole.
My, we have short memories.
Do you get emotionally attached to the plants in your garden ?
Only 50% of middle age adult manage more than 1 brisk 10 min walk a month.


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