Actually, no, you didn’t.
You said, “They were compiled by Pope Gregory I around the year 600, and you’re correct - there is no such term in the Bible. It is purely a Catholic term.”
In all seriousness, and without malice, I realize I was likely being too literal, but that is my tendency, to be literal. Your statement, in direct response to the phrase you quoted, implies that, in the most literal sense, either “sin” or “lust” is not in the Bible. But, again, that’s literalistic thinking for you. Perhaps you meant as you’ve now stated. Fine by me. I was merely pointing out, in what was intended to be a somewhat genteel fashion, the relative lack of clarity.
The Bible is true, and certainly warns against lust. Sin is sin, and we don't need terms bandied about such as these 7 sins are more "deadly" than others. It is a terrible web to weave, because it implies that some sins are more "tolerable" than others. Building straw fences like that can lead others into false teaching, which the Bible is clear about.
All sin grieves God, and is in opposition to the supernatural Deity of Christ. Only Christ can save us, and all of us need to make that choice of will for Him, or against Him.
Sexuality is a very powerful, and dicey subject. On the one hand, it is God given, and in marriage, is an expression of love that is transcendant. On the other hand, the degradation of our humanness through sexuality is the work of evil. My definition of evil is the twisting of purpose....God's purpose.
Many people find it hard to wonder what heaven will be like if there are men and women there, but no sexuality. I take it mean that we will not need that component of sexuality in the equation of God sanctioned love because we will have the Love of God.