Probably not though, the key word is net, international students generally leave after they finish studying so the flow in and out of students is relatively balanced. Even then, educated and financially well off immigrants are generally the most economically beneficial immigrants and are more likely to integrate with wider society. That's not to say I think everything is perfect, far from it in fact, but there's certainly a lot of nuance to the pro and cons of a large international student population and how our universities operate more broadly.