The hiring manager probably doesn't see it, but recruiters and HR do, and they have a mandate to make sure that the company is hiring at least X% of people with disabilities.
In a world where 99% of resumes are never going to get seen by the hiring manager, checking the disability box might be the only way to have your application get past the initial recruiter/HR or recruiting-software screen.
In a world where 99% of resumes are never going to get seen by the hiring manager, checking the disability box might be the only way to have your application get past the initial recruiter/HR or recruiting-software screen.