IMO he's right. Religions were not invented. Religions are evolved together with mankind as humans were searching for answers when they seen something inexplicable. Certainly if there's a demand someone will turn up with some sort of "supply". This is how charlatans, priests, psychologist trying to satisfy these demands for the quick buck

.
That's only what they want you to believe. It is quite hard to interpret ancient writings the way that suits the people. Belief in nature and the supernatural probably did; religions like Christianity did not.
As a religion people, I keep my faith and pray to God to calming and strengthen my self when I got problem. I always giving thanks to God when I was blessed and got luck in my life. I think your opinion is not wrong, because every person has different perception about that. Other people used religion to control population, but for me, I used that to control myself.

But again..
Why would you need that?
The need of attention or the need for feeling like someone cares about the things you are in need of or what you are happy about.
It looks more like a imaginary friend from a child that has a bad childhood with abuse.
That's quite irrational. Praying doesn't strengthen anything besides you thinking it does. That's where the delusion comes in. Has anyone ever written a scientific paper on the benefits of praying on the body? (besides the nonsense of being calmer/nicer and what-not) I doubt it; case solved.
If you really want to strengthen your persona you should take up something that actually works. Meditation (it actually has health benefits).