In many places people can make the choice to bicycle. That they don't choose it is why so few places have infrastructure for bicycling.

I live in one of the few places in the US that has the geography and density to make bike commuting one of the fastest and most efficient ways to get around. I would gladly ride a bike almost everywhere if it were safer.

I don't, because I don't feel like putting my life at risk on a regular basis just to get where I need to go.

There's a reason that bike ridership skyrockets when useful protected bike infrastructure gets installed. The demand is there.

Also many people can make a choice to where they live.

Not all, but many.

Sadly many places impose tight limits (via zoning) on the total number of people who can live in a specific area.