Social Security trust fund good through 2034, SS Disability fully funded for 75 years

https://www.cnbc.com/video/2022/06/02/social-security-trust-fund-good-through-2034-ss-disability-fully-funded-for-75-years.html

Not sure how to add the video to the blog.

I've heard for years that the disability fund is well funded, more so than the old-age trust fund. If so, then why do so many good disability claims get denied?