It's true that more companies are being created and seed valuations are going up. But the selection process still occurs at the series A stage and crappy companies usually still can't pass that hurdle.
As for the JOBS act: if I'm not mistaken investment is capped at (the lowest of) $10K or 10% of the annual salary. I believe you even have to go through a course before you can invest though the JOBS act. Conversely, in the stock market you can invest as much as you want, without any training, and lose everything overnight.
The fact is that economy fluctuates. Whenever there's an upswing people scream bubble. It's a result of the traumatic effect of previous bubbles. But the irony is that real bubbles sneak on you. Hardly anyone sees them coming. So keep screaming bubble, it makes me feel safe.