I saw this thread posted on the server and I definitely agree. I understand where the objections come from. But if the alternative option can be made to still have difficulty, without involving elements that the parkour causes trouble with, I think it is a great idea. I know it would take time to create, but perhaps long and involved tasks could still prove that the student has learned the skill sufficiently without doing the parkour. Because I feel like it is unfair that those with disabilities can't enjoy moving up through this server just because they are simply unable to complete quests.
I also want to take this opportunity to request an alternative to the elytra quests in the main course. My reasoning for this one isn't as important as disabilities making it difficult, but I still would like to address it. I play Minecraft on my laptop, and can't afford a nice gaming PC or anything like that, which means I find my game lagging sometimes. This becomes a real problem when it comes to elytra courses because my laptop literally cannot load the course fast enough for me to fly though it so I can never complete them. I realize this may not be a great priority, but I know I can't be the only one whos broke and struggles with this, so it would be really nice for an alternative (like a maze perhaps) to be offered.