To add to what @cleoforshort said:
Many ADHD kids, like my son, present themselves well and so professors who are not familiar with these disabilities may be thinking this is some “scam”. I have heard it from my colleagues several times about their students they have to accommodate. One of my colleagues thought that one of his students was “scary”. He had accommodations - I think he had high functioning autism, but this colleague had no clue about any of that. I try to explain . Unless they are faculty in the Education department or have kid(s) with disabilities, most do not understand. The WSJ article quotes a prof who is skeptical of the accommodations and the comments sections in the article had profs chiming in about “special snowflakes”.
My kid has a summer job that caters to his strengths and is managing well in college. Without accommodations, he would not be able to keep up. He will be a productive, taxpaying citizen. Would many of the people who are complaining prefer that he just not go to college and collect social security disability?