Religion and trade

So, the early religions in the Eurasian region were spread by merchants or traders. Not all were missionary. Presumably, all the traders were male.

Why were they inclined to spread ideas as well as goods? Was it to equalize the difference in value between what they collected and dispensed? Sort of like the tales of the Arabian nights were composed to entertain the hosts. Traders “singing for their supper?”

The seller knows he does not want what he is selling; the buyer is not sure he wants what he’s getting. Is the gossip designed to demonstrate good faith and provide an incentive?

I resent the comingling of commerce and religion. Is that because I am a female?