Obedience to God is not a matter of personal opinion. God's will for our behavior is found in the scriptures. The Catholic Church has studied, codified and refined its belief system into its catechism over the past 2,000 years. Study of the Bible and the catechism of your chosen denomination will answer all your own questions as to why the Church holds the beliefs that it does, against which uniformed personal opinions are a waste of timesort of like telling off an arresting officer when he says he clocked you for speeding.
Obedience to God is not a matter of personal opinion.
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Of course it is. Whether one believes he is being obedient to God is always based on his opinion regarding what the will of God is at any given moment. That is obvious by virtue of the fact that opinions about the revelation of His will have resulted in the creation of countless religious organizations Christian and non-Christian.