Not at all Steve, as evidenced by the fact that the US library of Congress does indeed describe itself accurately in a few words as:

"The Library's mission is to support the Congress in fulfilling its constitutional duties and to further the progress of knowledge and creativity for the benefit of the American people."

Nothing at all wrong with that. It does not claim nor even infer that all, or even that majority of its holdings are American or part of American tradition.

The problem I have with ITMA is that it does describe itself as:

"a national public reference archive and resource centre for
the traditional song, instrumental music and dance of Ireland"

when quite a lot of the material it holds is not part of Irish tradition at all. This clearly offends when material it holds is the intellectual property of people who are not part of Irish tradition. Not in all cases, but clearly some.

This could quite easily be solved by ITMA being a bit more careful about how it describes itself and its holdings.