I have experienced accidental electrocution and survived (probability be praised), and stuck my tongue on 9 V batteries, I don't need to see it. I just need to sense or apprehend it.
Free will is an abstract concept considering we are biologically guided by needs such as water, food, and shelter; unless you want to override your basic needs, they will influence your free will, and you will consume or die. Not so free.
After that, free will is guided by culture, laws, and environment, etc.
Free will is just choice, if there are choices available.
If there are choices, there is no need to 'grant' free will, it is a natural occurrance.
I agree with you about free will in general.
What I don't agree with is the religious description of free will and what is implied by that context.
It comes up a lot.
As for electricity, it can be measured and manipulated with anticipated results.
~Watts are a measurement of power, describing the rate at which electricity is being used at a specific moment.
~Watt-hours are a measurement of energy, describing the total amount of electricity used over time.
So, even though you can't see it, it is still a reality.
Another example of something that exists that is not seen that requires no belief is magnetism.
Even air seems to be invisible, yet it is a reality because it can be proven. If you extract the air from a box you are locked in, no amount of belief will allow you to breathe air that is not there. You suffocate and die.
Beliefs are delusions of reality. Once a delusion is lifted and reality is known, its very difficult to re-delude yourself.
Example:
I believe that hot stove will not burn my hand if I touch it.
That delusion will persist until I touch the hot stove and burn my hand.
Once that happens, no matter what I want to believe, I know the reality.
My delusion has been lifted.
There are also times when our beliefs are justified.
I believe there is electricity in my wall outlet. I don't need to shock myself to prove it. My belief is based on evidence when I plug in and turn on the light. My belief can also be a delusion if the breaker is popped without my knowledge. In this case, my belief can be tested with a verifiable result. The delusion is justified with knowledge. With that knowledge it becomes a reality, no longer a belief.
Religion tends to try to justify belief with other's belief.
That's like telling someone the power is off for that outlet, go ahead and touch the wires. All they while, the person telling the other, doesn't 'know' if the power for that outlet is on or off. Even if 15 people say the power is off, until they know it is, no amount of belief is going to make it so. They could be right or they could be wrong. Do you touch the wires or do you go test the breaker yourself to make sure?
Now, what if you question those 15 people as to the validity of their belief. Do they all say "hold on, let me check" or do they berate you and try to prove their belief using that belief as justification. Do they write signs and sayings and hold them up as proof the power is off?
If you challenge those signs and sayings do they attempt to justify their belief with more signs and sayings? Do they call up other people that also believe the power is off to try to validate their belief?
Do ANY of them actually take you to the breaker to prove the reality of their belief.
What happens if you take their advisement and touch the wires and don't get shocked? Are you convinced that their belief was real or do you still try to find out why you didn't get shocked on your own?
You go to the breaker and it is still in the on position? what you don't know is there was a storm that interrupted the power, right at the moment you touched the wires. Nobody knew that fact at the time.
Their belief is justified but not for the reasons they believed.
Until you have knowledge of the reality, the delusion is justified.