I think society has been succeful in developing this narrative that if you don't belong to a particular religion you're now devoid of spirituality
 
You can be spiritual yet not belong to a religion.
You're basically entrepreneurial in your spiritual endeavors.
And just as with literal entrepreneurs you'll allways make more or have the opportunity to do such on ones own than working for someone else/another company/ religion.
It's no coincidence that females are primarily the most devote the most religious
 
It's successful fear mongering. Just like they convince most women at young age "when you grow up you need to get married to have someone take care of you" as opposed to helping them mentally and emotionally being able to do for self they brainwash and train them to rely upon a man. 

Not all but most.
This is what's done with religion. Which is male dominated.
How? When life/universe "God"

 has chosen you all to be the natural incubators for life nurturers of our futures why would you need to go through someone else 
 
As a man I don't so why would you

It's no coincidence most religions and their holy books if you really "READ" then
 
Treats woman like shyt and second class citizens 
 
Blame them for much of life's calamities 

And before Muslim women who aren't allowed to drive or show a little leg start rambling about Quran 
No woman in her right mind would be out in 98 degree weather with nothing but her eyes being able to show
 
Or how they don't allow you to embrace your sexuality
 
Which is your most potent tool in this world this lifetime
But most entrepreneurs are scarred at first to get their feet wet
It's usually best to start on the side while you already have a job/occupation
So the same can be accomplished with ones spirituality
Keep in mind most major religions are savages 

Requiring death to untold millions past present and future
You can not grow spiritually with that type of blood on your hands
