Why is the word “at” considered offensive and being requested to be removed from the dictionary?

A LGBTIQ foundation in Great Britain has asked all staff not to use the word “at” but a more inclusive language. This has been required to be used by other institutions. Previously, the word “in” but also that “baba” was removed from all government forms by Ontario lawmakers in [...]
Previously, the word “in” but also that “baba” has been removed from all government forms by the lawmakers of Ontario in Canada to reflect “the diversity” of households.
The word “at” and that “baba” are extremely specific in this gender direction and is considered to be discriminatory and exclusive to parents of the same sex, lesbian or gay.
However, the debate on this issue is still hot and developing. While LGBTIQ requires full removal of “into” and “baba”, a part of the progressive community requires simply to include more inclusive terms such as “guardian” or “prind” in question without removing the above traditional words.
Many other institutions around the world have already changed the way they refer to their parents, and there is great pressure on this to happen in all parts of the world.