Totally get that. I grew up in a place much like the one you describe here, in the deep south too, even. My town had a population of ~300, and our commute to school and grocery stores took roughly the same length of time. That said, we did still have a school bus. If we didn't, we probably would have been home schooled, just due to the commute. Given the large amount of people living in that town over age 70, I can imagine the benefits of say, a bus that took people to the grocery store and back. It would be life changing for some people in that town, and could occur if we allocated funds to improve public transit/alternative transportation nationwide.

But no, I don't see these communities going all in on bikes, obviously not. Luckily, we aren't really talking about these communities. At least not primarily. 80% of our population is in cities, and we should be fixing things there, not in rural areas where the changes don't make sense. A person in this thread mentioned being from a rural town in the Netherlands, and how they had bikes, but still used their car lots of the time. I think we can both agree, no one with any serious political power in the Netherlands is coming to take rural citizen's cars away. We can instead focus on improving climate costs in other ways in rural areas, like shuttle buses for the elderly, like I mentioned. Or, for example, improving access to local agriculture with CSA's or farmer's markets, creating classes teaching people how to grow their own food, replacing appliances that rely on gas and coal with more climate friendly alternatives (possibly through government buy backs to make this feasible for people with low income), and yes, replacing ICE cars with electric cars (an overhyped technology for sure, but one that actually makes sense for this population). The infrastructure isn't there for electric cars today, but we also didn't have gas stations on every corner when ICE cars first started selling. That will all come in time, and will come faster if people demand it.

I live in a mid size US city now with bike trails that can take me to the suburbs and back in an hour or less. We have light rail and buses that can do the same. This sort of infrastructure could be improved to be more protected from drivers (in the bike lane sense) so that more are encouraged to ride it. The public transit here could be made more affordable (transit paid by tax instead of upfront fair) so that people use the public transit over cars or even ride sharing. This type of public transit/bike infrastructure could be applied to many many more American cities. Unfortunately, cities like this are the exception, not the rule, for our country. I think that's a shame.

Tl;dr - I don't think we disagree. This is overwhelmingly a solution for the cities and suburbs, where most Americans live. There are lots of things we can (and have to) do to fix climate change. Bicycles shouldn't be a golden hammer, but they are a very underutilized tool that can help fix this problem.