Whether the person wills the experience does not mean that the experience didn't come from God. Freud does not prove that religious claims are false
Response to Ramachandran
He doesn't dismiss the idea that God may use the temporal lobes to communicate. However he does argue that its not sciences job to prove or not prove God's existence
Response to Persinger
The experience Persinger replicates is merely similar and cannot ever be truly similar to a religious experience as they are subjective.
Response to 'they are merely subjective'
Just because they are subjective does not make them false. Swinburne would argue that a person should be believed