"What's the point of a BDSM session? If I told someone that I was paying a woman to come to my house, kick me in the balls and then slap me before shoving things in my ass, I can't even imagine what they would say to me."
First of all, this cannot be boiled down to a simple goods-for-cash dynamic.
Yes, I am getting paid.
Yes, you are the one paying me.
But I am not a convenience store with product on the shelves, ready for consumption.
We must communicate.
You must be willing to bare your needs, desires, fetishes, and whole sexual self to me, in order for me to give you the EXPERIENCE you desire.
You're paying me to give you the sensory and mental input you crave, in a stylized manner that allows you to give up the constant drive to control and withdraw.
You're paying me to get what you want, the way you want it, in a safe and secure setting, without any fear or shame.
Reducing what you want to the lowest common denominator ("come to my house, kick me in the balls, slap me before shoving things in my ass") feeds a perceived "wrongness" of it.
What I do is not wrong, but it is taboo, and it is not for the faint of heart.
There will be consensual pain, but it is a portal - it allows you to let go of the other types of pain that plague you.
The concept of "how much can you know about yourself, if you've never been in a fight" applies here, as well: how much can you know about yourself until you let go, and give up control to me?
Asking "what's the point" of a session is like asking "what's the point of sex, for pleasure?" - the point is the emotional, physical, sensory, and mental input.
The point is experiencing pleasure on your own terms, in the way you most desire to feel pleasure.