I wanted to make a productive investment.
There are 2 types of investing, speculative and productive. When I looked at my retirement account 10 years ago, it was largely index funds and ETFs full of very big corporations like Apple. I realized I wasn't funding Apple or any of the companies in the stock market because I was buying the shares from another investor, no value being created.
I wanted to invest and fund the operations of businesses creating real value like a local community business or innovative clean tech. I wanted to make a productive investment.
Long story short, the only way the public can make a productive investment is through crowdfunding.