I agree that the dating process is very superficial, especially at the beginning. So it's not dreadful to be thrown by a wheelchair/ Can't comment on the swinging side of it - I have no frame of reference for that at all
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Should he have 'warned' you? No, I don't think so, speaking as someone who spent years in a wheelchair.
When you're in a wheelchair, it is not an important thing to you. The hard bit comes from how the rest of the world sees you. The idea that someone would have been less willing to know me and give me a chance is very, very sad when you are the person in the chair. So you adapt by changing the world around you. Because other people seem absurdly bothered about the wheelchair, every conversation comes to have this extra task of helping the other person to forget about it's there. And little by little, they do. But it takes a toll. The world is constantly reflecting back a distorted picture of yourself - i was not 'lost', but 'lost the disabled lady'. To fight that, as a matter of survival, you either become militant about making the disability a feature of your identity (I'm lost and I'm Brave, Heroic and Inspiring yet amazingly Just Like You...') or you ignore it and hope they will too.
Would you expect a black guy to warn you he was black, or a person in remission from cancer, or someone who has committed a crime and done their time, or a Syrian immigrant to make this information available on their profile? Where is the line? What information is sufficiently awful that you should give others a heads-up before inflicting yourself upon them? Especially when you know that they will give you as much of a fair hearing as someone flicking through channels with the remote, looking for something good to watch?
Personally, I think it is quite understandable that disabilities are not aired in a profile. Why would you advertise to the world something that already seems to loom much larger than it should in the public imagination? When you present yourself on a first date, you are saying 'this is who I am'. If being disabled is an important part of that identity, it will be mentioned. If it's not mentioned then you should play up and take the person as they clearly wish to be taken - as a person, just like you.
If society was as it should be, this guy would probably have told you beforehand about the wheelchair. As it happens, your reaction is an excellent illustration of why he decided not to.