Based on the response you got back from BYU, I'd say their accessibility office culture is not very proactive. Sounds like they are more worried about liability, and so do the bare minimum to avoid a lawsuit.
They need to hear about that reason and see the bigger picture. Making us have to go across campus to access meetings or classes is not ok if it can be avoided.
BYU has been a lovely place to learn and meet people, however BYU and Utah in general is a very hard place to live when you have a serious disability. I don't believe that any of this is malicious, but I do believe we can make it better.
Accessibility allows us to be more inclusive because it helps people who have a disability feel like they can participate like everyone without being singled out.