I'm a hardcore bike commuter; have been for decades. I've led bike-to-work rides, ran a bike repair tent on bike-to-work day, planned bike-to-work routes for people. I looked up the history and found Bike to Work Week has been going on since 1956. Not to be debbie downer, but I don't think it's making a dent in drive-to-work.
I'm going to venture e-bikes have had more impact on people cycling to work than 70 years of bike to work week.