I mean yeah it absolutely is. But the city layouts are also designed with that in mind, which is a challenge too.
It was all retrofitted here in Europe after all.
London, another massive sprawl, opened what’s called “cycling superhighways”. These are on disused railway tracks, covered with high quality tarmac. Wide, straight, lit, off-road, bike-only trails taking you around the city (into the centre in particular).
I wouldn’t call London cycle-friendly but these really make long commutes feasible. A friend of mine, no exercise freak, happily cycles 40 mins each way on one of those.
In europe it is more common that you have things like a supermarket in walkable distance (or atleast short trip on a bike).
So back-fitting cycle lanes is rather difficult, when the roads are already too narrow for cars, and can't be widened.