I also reject that things like electronic trading for the masses are bad because the general public has bad investors. That's like saying online fraud should determine my access to ecommerce.
In many ways, platforms will help validate concepts through user participation... And the community can validate credibility. I don't just think this is a dumb money thing, I think investors will have advantages they've also never had. The bottom line is both sides of the market will get a clear benefit.
edit: Also, on top of not enough deals, investors don't normally easily get access. In the past, this was for the investor's protection, of course. Theoretically, this would also solve that inefficiency. Again, in the past, this inefficiency existed for the investor's protection, not a bad thing.
I would also say it's a stretch to call this "pent up money." Equity crowdfunding is merely an alternative outlet for your money (the usual outlets being currency, bonds, public equities, etc.). You can think of in terms of substitute goods.
Not to mention that most people have absolutely no business investing in startups. All the best deals are going to go to the established, connected VCs and angel investors who can add value in addition to the money invested.