Okay it doesn't help AT ALL. Like 0% of the time if the buyer has a brain and he wants to chargeback and opens an unauthorized transaction it's completely useless.
If the dispute reason is item not as described or didn't receive my item it might help you, however it's not a 100% chance success it will.
I ask some of the new members to open a dispute and close it before they are able to receive the items I sell to them, also I ask them to send the money with no shipping address (if im selling a digital item obv.), they can't open the dispute again so yeah.