Related to the handicapped traveling, I can say that our experience, though not much with flying, has been pretty much the opposite. My wife is a double below-knee amputee, and there are times that due to some other health issues she can't use her prosthetics. We use a travel chair when going places, and I must say that our overwhelming experience has been that people will generally make lots of extra effort to help us. And I can report that they are often those with 'different lifestyles' and appearances. There is hope for the next generations yet! We always appreciate their help and try to thank them profusely.
Regarding the better data integration, I thnk we need to be careful what we ask for. The obvious solution would probably be government intervention and we all know how well that works. As one who has lots of experience in this area, I can understand that most people have little or no expeience dealing with this, so I can understand some problems.
As one who has worked with data for decades, I would add that we need to put lots of effort into the data we provide to systems, ours and others, realizing it works both ways. And maybe there is more we can do in terms of checking for ourselves instead of depending on data systems. In lots of situations we do the 'call ahead' thing to make sure our needs are reeceived and understood, such as wheelchair access to restaurant tables, and other times asking for 'soft seating' since we're old and sore. And we tip extra for good care.
On the other hand, we usually try to not take too much advantage of the situations, realizing that we are responsible for ourselves and our needs, and are just thankful when others help. At our ages, we are blessed to just wake up again in the morning.
Another thought on this, in the rare instances of our recent flights, we've found that you can normally ask the flight attendants to message ahead and have help at the arrival gates. And if you ask for help, the airlines and airports will most likely have electric carts to transport you from gate to gate.
One of the best days of my IT career was the day I told my boss if the problem was so simple he should go fix it himself.