That would be merely a religion of humanism. If you judge a religion merely by its effect on a person, then you are essentially saying, all that matters, is humans.
Miracles are *THE* most important part of religion. Yes, they do "prove" a religion. The biggest problem in that area, is whether a person is content to accept proof of a miracle occurring in the past, as proof of a religion, or whether they require that they get ongoing, yearly/monthly/daily "miracles" occurring in front of them.
I'm not saying that humans are all that matter. I'm saying that we are the best guages for measuring the impact of the divine in our own lives. If you see someone walking on water, for example, it should certainly get your attention, but it doesn't prove much by itself. Instead, the miracle is an invitation to learn more. The Bible speaks of people of people who deceive others by performing false miracles. And our own perception is sometimes flawed. So, don't be too hasty to accept miracles as proof.
The only miracles that constitute proof are the ones that happen in your heart. These are the ones that nobody else can see. These are the ones that change lives the most.
Problem with that is, what kind of person says to the creator of the universe, "keep me entertained, or I'll stop believing in you when I dont see miracles any more"?
I'd say, someone who is either an idiot, or who has WAAAYYY too high an opinion of their own importance.
I completely agree. These are the people who depend on external miracles rather than allowing God to work on them from the inside out.