lol To be totally honest, my entire time as a Christian I never felt God or Jesus. I felt the angels. They were real to me. The same goes for children and their imaginary friends.
I'd be truly surprised to find a theist who could say without flinching that they feel their god(s).
You're conflating two religiosities. Each originates in different, distinct neurological processes and events. One religiosity produces spirits, demons, dead saints, dead ancestors, gods, and so forth. People who come at it from that religiosity "feel" the presence of spirits or gods in much the same way you might now and then have a sudden, fleeting impression someone is looking over your shoulder when no one is actually there. It's a common brain fart.
There is another religiosity -- totally separate neurological processes. The second religiosity is behind mysticism. Think Zen satori, Taoist illumination, the Buddha's experience of nirvana. It's a much, much rarer brain fart.
Mystical experiences of "ultimate reality", so to speak, resemble
religious experiences about as much as raw passionate sex resembles a high school biology text book on reproduction.
Check out the life of Thomas Aquinas. He spent years writing clever commentaries on god. Volumes of theology. Then he had a mystical experience. He shut up at once. Quit talking theology. Quit writing theology. And said, "Everything I have ever written now seems like straw to me."
Anyone who thinks mystical experiences are the same as religious experiences is a virgin. They ain't never been laid.