Your assertion that "wheelchair bound" is the more professional term is completely incorrect. "Wheelchair user" is the professional choice. Please refer to the BBC style guide, Guardian style guide, and National Center on Disability & Journalism: 

 Guardian: "Say (if relevant) that someone uses a wheelchair, not that they are "in a wheelchair" or "wheelchair-bound" – stigmatising and offensive, as well as inaccurate" 

 http://www.guardian.co.uk/styleguide/w 

 BBC: "When describing disability, make sure you use the currently acceptable terms as advised by the main national organisations, such as blind people, deaf and hard of hearing people, people with a disability. Ideas about what is acceptable can change and can vary among different groups. 

 Don’t use words such as ‘suffer’, ‘victim’, ‘handicapped’, ‘challenged’. Some alternatives: 

     * suffers from, is a victim of - has 
     * handicapped/challenged - with a disability 
     * mentally handicapped (people) - with a learning disability / learning difficulties 
     * wheelchair-bound - a wheelchair user 
     * handicapped toilet - accessible toilet" 

 http://www.bbc.co.uk/branding/text/writing_style_guidelines_sep07.html 

 NCDJ: 

 "Confined to a wheelchair* (“wheelchair”) Avoid using “confined to a wheelchair” or “wheelchair-bound.” Instead, use “person who uses a wheelchair” or “wheelchair user.” " 

 http://ncdj.org/styleguide/