No, I don’t think it’s the same thing. For “actual” (the American Heritage dictionary also lists “based in fact” as a definition) the meaning I chose had at least something to do with your definition - I don’t see that as a lazy colloquialism, I see it as a (possibly arguable) logical expansion. Whereas with “disinterested” and “fortuitous”, the way they’re used that I’m complaining about has fuck-all to do with their “real” meaning and is a result of ignorance and faulty inference. Look: if you were hanging out in a dorm (for example) and everyone in the TV room or whatever kept saying “suburban” when what they obviously meant to describe was “urban”, would you think, “Cool, they’re helping the language evolve!”, or “These people are pretty damned stupid”?
Don’t get me wrong, I know what you’re saying. I’m not some old academic who’s typing this from his leather study in his armchair surrounded by my built-in oak library shelves full of books on the decline of modern discourse and mounted animal heads. Hell, I’m not even college educated. But it bugs me. Does it affect my blood pressure? Probably not. Am I petty? Maybe so. All kinds of pointless shit bothers me - from drivers who don’t signal to Donald Trump to McDonald’s commercials trying to be “hip”. Not that I lose sleep over any of it, but they’re annoyances, and I voice my annoyance. I freely admit I haven’t achieved Buddha nature, though I do find that state of mind admirable and strive to reach it. And I try not to tell anybody how they should live their lives. But I still think people come off as ignorant when they misuse words in this manner, and I don’t see anything wrong with politely correcting them.
So let’s say you’re right, and I’m just being rigid and reactionary in my views. And I’ll concede this may be the case, and I’m not taking the more enlightened approach. And both these words have indeed incorporated these bastardized meanings and that’s fine, just the inexorable flow of living language. I’ll then amend my rant to the fact that I find it sad that these new definitions have arisen because of general laziness and/or ignorance. And yes, I realize that many words have undergone changes for just such reasons. And yes, I still have a problem with it. What’s wrong with pitting willful ignorance as a cultural motivator?