I know when I went for SSDI at 32, I was told they automatically reject everyone under 50 and to expect to have to appeal (that is exactly what happened)

scaremongering, 38% get approved on the initial application and this is has been true since at least 1999 usafacts.org/data-project...

What is the approval rate for Social Security Disability Benefits?

Thirty-eight percent of applicants who meet technical requirements are accepted initially, but 53% of applicants who appeal that decision are ultimately approved.