Question for Jehovah's Witnesses: Father?

Jehovah's Witnesses are taught that out of all the hundreds of millions of Christians who have ever lived, only 144,000 were actually picked by Jehovah to be spirit-anointed, to be brought into his family and welcomed into heaven upon their death.

Only this small group of 144,000 believers have the right to call Jehovah "Father".

As only around 10,000 of this group are still alive in earth today, the overwhelming majority Jehovah's Witnesses (of whom there are roughly 7 million) are not God's children.

My question for Jehovah's Witnesses: why do you call Jehovah "Father" when you pray?