Blind person here. On line learning is the best thing that can happen to diversity and inclusion, particularly when disabled people are concerned. For me, being in an environment free of students constantly shouting over my speech synth made a huge difference. I could adjust the volume of the teacher, or even mute them for a while, when I really needed to focus on the speech. Being able to request the name of the person talking, or hear who joins/leaves/raises hand is really useful too. I imagine the difference is even bigger for blind teachers, as they normally don't know who raises the hand or talks, and that's very important to them. Other disabilities benefit too, wheelchair users were very relieved they didn't have to move / be moved through inaccessible buildings etc.
There are a lot of accessibility implications to on line learning, most of them positive. Personally, I wish I could just stay that way forever.