You are being closed minded discouraging one of the best adapted indoor pets of any species available by fear mongering a rare disease caused by poor husbandry.
The presence of this condition among racing homer enthusiasts disproves your assertion that poor husbandry is the root cause. Due to the nature of their sport extreme sanitary conditions are the norm. It is indeed a condition brought on by prolonged exposure to pigeon dander that not everyone will develop. To not admit to the possibility, and warn of it is dereliction.