Obviously, it's the bronze age. That's always going to be part of it when each tribe & city has their own primary god. But the point is that Ba'al and Yahweh were competing over recruits. That's why Ba'al is seen as subversive. It's why Yahweh punishes jews that strayed from Yahweh and worshiped Ba'al or built shrines/temples to him.

You asked me why jews chose Yahweh over Ba'al. As in, since jews could make a choice in who to worship, why chose one over another? Simply saying that the Isralites and Cannanites are different ethnocultures doesn't answer your question.