> The person's time is worth $0/hr

The time dedicated to getting physical activity is also worth 0$/hr (or even negative at a gym)

> The person is not disabled

What point are you actually trying to make here? That just because some can't bike that the argument is invalidated for the rest of society?

> The person doesn't need to carry anything that can't fit in a backpack

The person has never heard of baskets or cargo bikes

> The weather is clemant enough

The weather is blamed rather than the poor infrastructure

> The journey is short enough

Short enough for what? Also a repeat of the first point.