To deny that an orientation can change is to deny the witness and the works of the Holy Spirit and to bring scandal upon the church. At some point, we need to come to a decision on whether we believe Side B theology and, therefore, self-styled “gay Christianity” to be a sin of a more heinous nature.
At the 2002 General Assembly, the PCA adopted what is deemed as “good faith subscription.” This gives each presbytery the right to determine whether a candidate for gospel ministry has stated differences with the doctrinal standards of the PCA that are acceptable or not, so long as the differences do not “strike at the vitals” (BCO 21.4). As a result, it has become common practice for candidates to take two exceptions to the Westminster Standards: (1) recreation on the Lord’s Day and (2) what constitutes a violation of the Second Commandment. These are so common that it’s rare in many cases to see any pushback from the presbytery floor during an examination on these exceptions. Whether or not adopting this practice was the right decision by the Assembly is beyond the purpose or scope of this article. Like it or not, that ship has sailed.
However, with the advent of Revoice and Side B Christianity, it seems a new exception has come to our presbyteries, at least in practice—an exception to the teaching that some sins are more heinous than others. Westminster Shorter Catechism Q. 83 asks, “Are all transgressions of the law equally heinous?” I would venture to say that many evangelicals—and dare I say many Presbyterians—would answer with something like, “Yes! All sins are equal in the sight of God. We all need grace.” Obviously, we all need the grace of God. We are all justly deserving of damnation, even for the smallest of sins. But that’s not the answer to the question. Divines give the following answer: “Some sins, in themselves, and by reason of several aggravations, are more heinous in the sight of God than others.”
Expanding on this teaching, the Westminster Larger Catechism, Q. 151, gives numerous aggravations that make a sin more heinous. The list is extensive and includes many things worthy of note (e.g., sins on the Lord’s Day). Among those aggravations listed that make some sins more heinous are those against the Holy Spirit (including His witness and workings), those that harm the weaker brother, those that are of continuance, and those that are against the light of nature.
As the PCA affirms, homosexuality is condemned as a sin against nature in Romans 1. However, Side B theology states (at least in a loud majority) that sexuality is not something you choose but part of your overall personhood, or said another way, sexuality along with gender, nationality and ethnicity are all features that make up ones composite identity.
 https://revoice.us/about/our-beliefs/statements-of-conviction/statement-on-sexual-ethics-and-christian-obedience/. See also Rosaria Butterfield’s quick and helpful definitions of both Side A and Side B: