The trouble isn't with the core message, 'it's not that easy', it's that every time someone broaches the issue they're always in some sort of sadistic competition to be even more cynical and condescending than the last person. Obviously these peons simply didn't get how wise they were when they were level headed about it, and now it's time to remind them all what useless pinheads they are.
Now I'm not an industry insider, in fact I'm an amateur indie developer, but I have something to tell everyone whose ever read a Hard Truth(tm) put down. They aren't wrong, but they aren't actually telling you anything useful either.
So what is the useful information? It's simple, if you want to get involved in making games, you kind of have to actually like making games. If you either can't be bothered to learn the software for a mod kit, or get an office job, or just hate those activities with a passion, then maybe game design isn't for you. It's probably not something you'll ever like being a part of, and in the end you may come to hate your own idea because of burnout. But that's only side A. If you love getting involved in modding, if you love programming, or working as a hiring person, or game testing, or writing, then boy are you in for a surprise... You're actually welcome here. Okay so nobody is going to trust your pitch with the ten million it needs to become reality, but that's okay, because you know what you get to do in the mean time? Have a lot of fucking fun doing something you love.
If you're a writer, write. Get out there and write a book, you may not have an in to get hired as a writer straight up, but maybe you'll get to write a book for a game. Then do some writing for the next game, or if your book gets that popular, maybe they'll approach you wanting to make a game for YOUR book. If your an artist, take your time, nail that portfolio, work in movies or comic books, hell print ads are excellent for learning composition. Then guess what, you'll have a portfolio and people who think what a swell person you are, and all while doing exactly what you loved doing.
The fact that your idea is going to have to mature before it actually gets made shouldn't be a horrible disgusting truth that must be borne in order to enter the club. It's a chance to get some experience, get better at what you already do best, and most importantly, relax and have fun. After all, if you screw up, at least it wasn't your idea.