VC's take 2% of invested funds as a fee. The Airbnb founders are apparently taking 1/6 of invested funds as a "one-time dividend". You're not comparing like with like. VC management fees end up being less than 2% of the valuation of the VC portfolio assuming the portfolio earns any money at all.

The point of investment is that the money is supposed to allow the company to grow. When 1/6 of that investment isn't even invested in the company, but rather given as a no-strings gift, it's not an investment anymore.