You don't need to show up in front of the US Congress to protest. Thankfully if there's one thing the US knows how to do, it's for people to protest wherever they find standing room, and still get their attention. I'm not sure about you but I vividly recall this happening during Occupy Wall Street. People protested (even overnight) in all sorts of settings around the country that had no obvious relevance to Washington (or NYC).
Yes, it's very funny isn't it? OWS wasn't about an emergency, it was about a long-term chronic problem with no obvious immediate solution everybody could agree on. OWS also wasn't in the middle of a pandemic demanding something Congress had already, practically unanimously done in a heartbeat. So funny that it didn't result in any legislation.