Indeed following the Torah would create a very problematic and arguably immoral lifestyle. And for many more reasons than this.
And Lamech took unto him two wives.
Now Sarai Abram’s wife bare him no children: and she had an handmaid, an Egyptian, whose name was Hagar. And Sarai said unto Abram, Behold now, the LORD hath restrained me from bearing: I pray thee, go in unto my maid; it may be that I may obtain children by her. And Abram hearkened to the voice of Sarai. And Sarai ... gave her to her husband Abram to be his wife. And he went in unto Hagar, and she conceived.
But unto the sons of the concubines, which Abraham had….
Esau ... took to wife Judith the daughter of Beeri the Hittite, and Bashemath the daughter of Elon the Hittite.
Esau .. took ... Mahalath the daughter of Ishmael ... to be his wife.
Then Jacob rose up, and set ... his wives upon camels.
He [Jacob] ... took his two wives, and his two womenservants.
If he take him another wife….
If a man have two wives, one beloved, and another hated….
And Gideon had threescore and ten sons of his body begotten: for he had many wives.
Elkanah ... had two wives; the name of the one was Hannah, and the name of the other Peninnah.
Thus saith the LORD God of Israel ... I gave thee ... thy master’s wives….
Solomon ... had seven hundred wives ... and three hundred concubines.
And Ashur the father of Tekoa had two wives, Helah and Naarah.
Rehoboam ... took eighteen wives, and threescore concubines.
But Abijah waxed mighty, and married fourteen wives….
Jehoiada took for him two wives….