Because to even reach the house floor those bills would have to go through Republican controlled comities. That wouldn't even gum up the works, they would simply be ignored. So she focuses her efforts on education people on what is really going on, instead of what the corpo news outlets are spewing.
Anyone in the federal legislature can introduce legislation that dies in committee. How exactly would that help? Its not effective obstructionism for a small committee to just ignore your bills every time. Most bills never even get a vote.