Do you agree that "like father like son'

弱弱地问：为什么if引导的条件状语从句主句用的是一般过去式?
like father like son：有其父必有其子
agree：
1.During people's whole lives ,father may often be the first teacher who teaches them how to live in the world.
2.Father is a person who always be relied on.Fathers are considered to be an aim to achieve.
3.As both father and son are male ,they are alike.
disagree:
1.As the father isn't respect by others ,the son does not want to be a person just like him.
2.The son does not have a father to imitate.
3.The son doesn't agree with what the father did.The son is a person with private personality.