I never suggested you haven’t studied the Bible, nor have I called into question your sincerity in seeking God, but I have studied this topic in great detail, including the scriptures you have referenced. I also said you might prove me wrong, but saying you have spent great time in the Word and seeking God’s will doesn’t mean you have studied a topic in great depth. I would challenge you to do so with this topic and then see if your response is the same.
Regarding the scriptures you shared, there is some uncertainty on “one wife” because of the word mia, which can also mean “a wife” which would in contrast suggest marriage was a requirement, but not marriage to only one.
Any “uncertainty” is on man’s own selfish desire, and the demand to fulfill his lusts. When you “know in whom you have believed,” and have more than mere religion, having put on the mind of Christ, then you will understand. The only way to “put on the mind of Christ,” is to bathe your mind in the word of Go that it might be transformed to God’s way of thinking.