Roads (or any other high volume transit system) are like bandwidth. Peak demand times such as rush hour (for roads) or every windows machine updating at once (for bandwidth) will always use everything you've got, degrade the service and people will forgo trips (bad for quality of life) or not do their work because they can't access some cloud service well enough (bad for productivity). You don't add more roads or bandwidth with the expectation that service will not degrade but to reduce the length of time during which it's degraded.

(Yes I know that MS does P2P updated and WSUS is a thing but this is just meant to be an example)

The usage pattern for housing is totally different because everyone needs to use it and demand is basically constant per person over time.