If the men feel uncomfortable they should switch from briefs to boxers.

education should be about learning and not how you look. Uniforms and lockstep are ways of indoctrination, to teach them to follow authority without question or face punishment.

Wow, so the Catholics are still subjugating and objectifying women? Huh.

So what are they going to do when these men are distracted by the crotches and asses of these minor girls when they're wearing pants?

Sounds like a strange place. Especially since they're talking about minor girls.
From the link:

After issuing “thousands of hours of detention” to students modifying the length of uniform skirts

As a quoted comment said:

If a male teacher feels uncomfortable over the length of a MINOR’S skirt, they have no business being anywhere near a high school.