You have indeed.
Again, it’s not that it’s (formally) a “hard line.” It’s a
practice of the Church. Because terminology is important when discussing doctrine, since there is of course all the difference in the world, just as you understand, between someone with any kind of disordered attraction and someone indulging that attraction. (Doesn’t have to be sexual specifically.) The teaching arm of the Church is very specific about categories. And for the very reason that morality involves behavior, not accident or mental constructs per se.
I appreciate that for people of your generation, the specific choice of words is “not that big a deal,” so to speak.

And also, I’ve noticed a social “etiquette” about that. (Use the words that a particular group finds more comfortable or uses themselves.) And that’s fine, from a social perspective. I would never go into a group of any kind and use terms that would be off-putting in the social environment, as long as it didn’t compromise my own sensibilities to do so (like agreeing to use a vulgar term or something).
But when discussing a Catholic doctrinal and policy perspective, that’s a different “world” or standard. And again, I’m talking about approved doctrine, and not more informal books such as you mention, which are in agreement with magisterial teaching but do not proceed from official sources in the use of their particular language.