Science can't measure or observe or take into account what is going on in the spiritual realm. It can only measure and observe effects of spiritual activity on the natural realm. Homosexuality is first and foremost a spiritual problem, like all sins.
Real science WOULD be able to detect an aberration--"I observe this man is, contrary to design, inserting his penis into another man's anus! Something has gone terribly wrong with him!"
The issue is with the scientists--they themselves cannot be trusted with adjudicating anything, having had their reason tainted due to their boasting.
Romans 1
22Claiming to be wise, they became fools...
24Therefore God gave them up to vile impurity in the lusts of their hearts, so that their bodies would be dishonored among them.
25For they exchanged the truth of God for falsehood, and worshiped and served the creature rather than the Creator, who is blessed
[r]forever. Amen.
26For this reason God gave them over to degrading passions; for their women exchanged natural relations for that which is contrary to nature,
27and likewise the men, too, abandoned natural relations with women and burned in their desire toward one another, males with males committing shameful acts and receiving in their own persons the due penalty of their error.
28And just as they did not see fit to acknowledge God, God gave them up to a depraved mind, to do those things that are not proper,
29people having been filled with all unrighteousness, wickedness, greed,
and evil; full of envy, murder, strife, deceit,
and malice;
they are gossips,
30slanderers, haters of God, insolent, arrogant, boastful, inventors of evil, disobedient to parents,
31without understanding, untrustworthy, unfeeling,
and unmerciful;
32and although they know the ordinance of God, that those who practice such things are worthy of death, they not only do the same, but also approve of those who practice them.