Yes, rabbits are disgusting. Disgusting alone doesn’t necessarily mean unintelligent design but having to eat food twice to get the nutrients is inefficient.
What is really being contrasted here is the difference between what is touted as intelligent design and what is ugly nature. To sell intelligent design IDers focus on the beautiful or the public perception of what is beautiful. Animals such as horses, giraffes, elephants, etc. They ignore parasites, diseases, inventive ways animals kill each other, and rabbits eating from their own ass. It’s just not good marketing for a creator God who is supposed to represent all that is good and beautiful in the world.