Another big mistake we are making in public education, and this is from PERSONAL experience as well as my wife, who works in various school settings. The mistake of trying too hard to incorporate disabled students in with the rest of the class. Example, a child has severe autism and needs special handling 24/7, but the parents and society at large are obsessed with the notion of them being incorporated into regular life, so they insist that they be in the classroom at all times except when receiving, perhaps, occupational therapy (etc). So the child sits in the corner making a huge commotion while nobody in the classroom is able to learn, teachers and students get injured, nobody benefits, the whole classroom suffers greatly, but Oh Yay, we "incorporated little Johnny into regular life".
I would say it's the benefit of one person ruining the benefit for the rest - but honestly, it's not even a benefit for that one student. They can't be in a regular classroom, period. It sounds harsh but is what we need to get back to in order to properly educate our students, whether it's "feel good" or not