I think this should happen more often than it does now.
Being courteous to a stranger is not that hard.
I have physical disabilities and walk with a cane. I have had people open doors for me and i have had people slam it in my face. It is the person.
In my experience, most men will hold the door for me. I never know if it's a woman. As long as the people are a reasonable distance behind me near the door, I like to hold the door for everyone, just to be polite.
Common courtesy is lacking today. I have seen many women get into a revolving door and expect me to push them through, since they are too busy on the phone. I always hold a door open for others, but I won't push you when in a revolving door because you are too lazy or distracted.
I have many health issues & am in severe pain all over 24/7, but I still hold the door open for others. I would feel bad about it if I didn't! Too many times, people have shut the door right on me, even if they see me completely doubled over in pain or when I was wearing a sling after hand & elbow surgery. They do that to my mom too, even when she has her cane or is riding on her scooter! It is sad how little common courtesy is out there these days! Hold the door open for everyone! Besides the fact that it's common courtesy, you never know if that person is weak, in pain, or has had a bad day! It is especially essential to hold the door item for those in a wheelchair/scooter, pushing a stroller, wearing a cast, using a cane, etc.