Driving is a pretty damn nice way to get around if you value time with your family. There is zero plausible financial case for biking instead of driving, unless you are able to own one less car as a result. The case for biking is that it's a way to get exercise while borrowing your commute time to do part of it. It's not even better for the environment unless maybe if you're vegan.
So, just to pick at one part of this post . . . I don't understand your last sentence at all.
The average car uses an ICE which is significantly less efficient than the drivetrain of a bike to move thousands of pounds (rather than a couple hundred) while also wasting power on daytime running lights, power for a stereo and other electronics, fans and blowers, etc. A car is less aerodynamic that the small profile of a guy on a bike. Using a bike is going to be more efficient than a car from a power consumption point of view, 100% of the time.
Then we get into the vegan part. Again, not quite following you. We have person A, who eats 2000 calories a day (vegan, omnivore, it really doesn't matter). Person A goes bike commuting and burns 500 calories. Person A could:
- eat two cups of boiled lentils
- eat four or five tablespoons of peanut butter
- eat half a cup of hummus and some vegetables
- eat a peanut butter and jam sandwich
There are obviously millions more choices. None of them are going to break the bank, or are significantly environmentally damaging. There's no difference if Person A is a vegan or not.
So, WTF did you mean?