Nothing in your post said anything about “E-bikes get people who otherwise wouldn't out on bikes”. Your post was all people who own bikes not riding them. Getting the bike out of the garage takes motivation.
Obviously you can buy an e-bike and it can spend just as much time hanging in the garage. Buying an e-bike does not buy motivation.
Like Samson said, a regular bike is cheaper and better for you.
In a busy world, 10 minutes on my regular bike is better for me than an hour on a e-bike
I think the main point is doing any exercise is better than doing nothing. If you have mobility issues or anything like that then an ebike might be good a good choice for you. If you have no issues then a regular bike will do. You just need to be motivated to do something.