To be realistic, who wouldn't want to be holding 30% of a $10M or $20M buyout? There will always be the allure of quick money, and tech isn't immune to the sentiment.
It seems to be similar to the Zed Shaw talk-within-a-talk . Instead of working for BigCo for a paycheck and going home to work on your own things, you use a lesser idea and work for a VC via their investments while developing your master idea. The difference is the level of risk and the size of the payout.
The other part that isn't mentioned here is this is a commentary on the most visible portion of the tech industry, namely web/app based social startups. I can't help thinking of Sturgeon's Law. In a way, that makes me cautiously optimistic. You have a bunch of people tackling hard problems in computing as well as society. When Facebook changes it's privacy settings, or Path collecting our address books, we all freak out. It forces us to confront things we as a society never had to think about before. Fifteen years ago, who was thinking this seriously about mass privacy concerns that didn't involve the government?
I also look around and think about what cool things happened in the last decade. I can look up anything from a black monolith sitting in my pocket. I can connect with people I haven't seen physically in years. I can read about events as they happen in real time. I can buy just about anything without ever leaving my house, and it will arrive a couple of days later. I can learn about any subject from very respectable institutions for free.
In a few years, we will have a (more or less) unified communication system for health records, cheap 3D printers and fabricators, a mass market for self driving cars, and privately funded space travel. Right now people are seriously considering space mining of all things.
All of these things were born alongside purely self-interested companies that have since failed or were acquired. If it takes many short term companies to get a few gems, then let the VCs, GooBooks, and hustlers knock themselves out. I highly doubt we can optimize for more success, so I don't see a point in fighting it. Maybe it's that very culture that allows for such gems to be formed in the first place. Even if you are involved with such a company, the talent and knowledge you come away with is invaluable and will follow you wherever you go.
I would say you should try to make your ideas a reality. You should try to make money, build companies, and commit yourself. You just might be involved with something great.