It is known that the physical strength distributions of women and men have very little overlap. Only the strongest of women are stronger than the weakest of men. This matters because firefighters are usually selected with physical tests, and most men would fail these tests. If women can pass the same tests, obviously they should be selected. As said in the video, 5% of firefighters are women, which sounds fine.

However, this is not what DEI is about. DEI is about seeing that 5% as a too small number, and trying to increase the number by lowering standards for women. Letting everyone apply is enough.