Almost - I think it's like driving home from work, hearing about a house on fire on the radio news, then, when you get home, you pee and think "I'm doing my bit contributing to the water supply for the fire fighters."

C'mooooon. Are plastic straws the biggest problem facing the planet? No. But they do account for ~3% of the plastic in our oceans. Doing something here is absolutely better than doing nothing. As Churchill said: "Perfection is the Enemy of Progress". This is definitely progress.