If the person in question claims and strives to be a Christian disciple, a Christ follower, then the issue without attempting any semantic gymnastics is plainly - sexual sin! More importantly, if the person in question is not a Christian yet - the primary issue then is - salvation!
Our assumption is that our jobs don't yield much towards God's bigger plans. We assume that God sees us as less spiritual than the minister at church. We differentiate between a worship leader/preacher with a teacher or a software developer or a nurse or even a mother at home.
Another crucial piece in this discourse that we so often tend to ignore is that we all are part of this fallen world! We are all fallen people. We all are sexually broken! We are all on the same large broken boat, perhaps on different decks. So all of us primarily need the Saviour!
Aquinas often invokes and sometimes attributes to Dionysius, that "goodness is by its very nature diffusive of itself and (thereby) of being". If God exists, we would expect God’s actions to often result in a state of affairs that has aesthetic value.
To understand we ought to know. Oftentimes, we don’t know the ABC of LGBT but have arrived at conclusions and are busy giving recommendations. There is a huge knowledge gap that we could be guilty of if we haven’t done the first thing in learning about this issue.
Along with the eunuchs (asexual), the inter-sexed are the only population that could say “I’m born this way.”
For the 'sexually disadvantaged' (asexual) the Scriptures have comfort and justice.