Yes, but bikes don't need as much infrastructure, because bikes are typically used for shorter trips, and they are much smaller and lighter. Buses transport many more people than passenger cars, so they can transport more people using the same, or less, infrastructure.

I don't expect every house to have its own train stop, I expect people to live much more closely together. Cars really are a necessity when everyone is very spread out, but, again, the more spread out everyone is, the more infrastructure must be built and maintained. You think it would be ridiculous for every house to have its own train stop, but you don't think it's ridiculous for every house to have a road built to connect it to everything else, regardless of where that house is. The truth is, neither is cost effective or efficient.