But seriously, it was not "a jibe" - it was a genuine question about who would do the massive amount of extra work to achieve what you're suggesting. If you don't work in HE, then you probably aren't aware of the work that goes into establishing solid and productive exchanges. But work it is. In a system which is being systematically starved of funding by a government with an ideological commitment to NOT paying for HE as a national common good as @ListeningQuietly says upthread.
You seem to be quite resentful of universities ...
But we work through international collaborations. Any decent research lab will have undergrads, postgrads, post-docs and permanent academic staff from all over the world working in it. That's how researchers developed COVID vaccines so quickly - huge international collaborations, sharings of data, sharings of methods and so on.
If you go to a Planck Institute in Germany, you will find researchers (at all levels from undergrads on) from all over the world. Ditto the USA, the UK, and elsewhere.
And we collaborate internationally just as much in the humanities, and not only in the study of languages other than English. The knowledge economy is global, and should be free to circulate.