God intends for us to learn from His design (1Co 11:14); it’s good in every conceivable way. (Ge 1:31) So when we violate any aspect of natural order, we’re asking for trouble.
This is the fundamental problem with homosexuality: it violates natural design. God calls this out when He describes it as changing the natural use into that which is against nature (Ro 1:26), and leaving the natural use. (Ro 1:27)
This isn’t complicated: we’re perfectly designed as male and female to procreate though stable, heterosexual relationships. Homosexuality is a fundamental, flagrant violation of this design: such relationships can’t produce offspring because they’re unnatural; it’s using sexuality in unintended ways for unintended purposes, twisting it, perverting it.
God forbids such perversion in His Law (Le 20:13), along with many other kinds of sexual activity. Because God is good, His Law is also good (Ro 7:12) for us all, and it isn’t optional: those who refuse to obey God as a manner of life identify themselves as children of disobedience, alienated from God and subject to His wrath. (Ep 2:2-3)
Our desires and natural instincts are not the point; we’re all born with a sin nature, with an inclination to violate God’s law: in our natural state we won’t submit to God. (Ro 8:7) God didn’t make us this way; we’re fallen beings, corrupted through our own lusts (2Pe 1:4), with a will that’s free to depart from God, and does so with remarkable consistency.
It’s not easy for anyone to control and discipline themselves, consistently curbing their natural appetites for a greater good; this is the mark of maturity and wholesomeness; very few master themselves here. It’s a journey, and it takes time. To truly overcome our evil tendencies, we must start by getting a new nature from God (Ez 36:26); our old one won’t get us very far at all. (Ga 6:15)
When we give ourselves over to unnatural desires they become part of us, taking root and establishing themselves, corrupting our souls and enslaving us (2Ti 2:25-26); this ultimately drives us to sin and separates us from God. (Ja 1:15) Normalizing perversion simply encourages more of us to do this, weakening our culture and destroying the fabric of society.
It’s wisdom to recognize God’s perfect design in us, and to concede that any inclinations contrary to it are rooted in lies designed to destroy us. When we align our minds with truth, our passions inevitably follow. It’s a spiritual war with a real, evil, spiritual enemy (Ep 6:12), seducing and tempting us. We ought not to give such an enemy place in us, receiving his appeals to seek satisfaction apart from God. (Ep 4:27) Rather, we should ask God to help us learn to be content (Php 4:11) in Him, trusting God to quicken us so that we can live for Him.