Sorry to hear that. Keep in mind that they have probably objected, in no small part, because they care about you. Doesn't always feel that way when they tell you 'it's a bad idea', but I'll bet that has a lot to do with it.
If you do end up getting a bike, I also agree that the FJR is probably not be the best choice for a beginner bike. Due to rising fuel costs, the smaller CC bikes are selling quickly (at least they have been here in Austin). I think you would have no problem unloading your first, smaller, bike, provided that you buy it used and pay a fair price for it.
Like you, I rode dirt bikes for years before I owned my first street bike, but a more experienced friend recommended I start with a lightweight bike. My first was an '87 Suzuki Savage 650. It was a great bike to learn on, and when I needed to sell it, I had no problems getting 100% of what I paid for it. My second bike was a Honda VFR 800 (which I miss), then a Kawasaki Mean Streak 1600, and finally the FJR. Anyway, my point is that you kind of work you way up to a bike like the FJR.
Hope it all works out for you, one way or the other. I feel for you. I've had 2 wives that didn't like the idea of me getting a bike (or a new one), and I've had two divorces, each followed by new bike purchases. Coincidence?
Still on my first wife.. we'll see if it lasts.... the bike that is