However, everyone was getting along just fine, with the bathroom at capacity - (5:1) The new bathroom only became necessary when another person moved in.
> Better infrastructure, by contrast, benefits everyone.
For various reasons, nobody was in a hurry to install a new bathroom before the sixth housemate showed up, and made the bathroom situation untenable.
> If you never intend to use public transit no matter how robust it is, this won't apply. However, in this case, you should really consider the environmental impact of your actions.
This doesn't just apply to transit. This also applies to sewage, roadways, city services like police, schooling, etc. When any of these systems are at capacity, and need a large capital expense to expand, it is unfair for existing residents to shoulder 95% of that financial burden.
Adding more buses to a bus line is not a large capital expense. Adding more trains to an under-capacity train line is not a large capital expense. Building a new train line, because a neighbourhood with 5,000 residents, who were sufficiently served by surface streets, but now has 25,000 residents, who cannot be served by existing surface streets is.
