The traditional way of defining disability devoteeism does a disservice both to devs and people with disabilities. In its simplest explanation disability devoteeism is a sexual attraction to physical disability.
The idea that there are people out there who are specifically turned on by a physical disability usually hits people pretty hard. The first reaction is often a negative one. Is it a fetish? Is it a kink? Is it born of a desire to control? Are they taking advantage of people? What messed up thing happened to these people that they think a disability is attractive?