Did you know there are places on earth where hospitals are a luxury? I've seen a tv program about a boat with doctors who go to Africa and help people for free. Nowadays even in the most remote areas people have smartphones so if you can do a self diagnosis that way it's better than nothing.
I agree. But I'm worried about the question, that all the same for accurate diagnosis, blood test data and others are needed. Since many diseases can have similar symptoms and an accurate diagnosis can only be made on the basis of analyzes.