Your article doesn't say anything about cost, only that it got built fast. Every time the toilet example gets cited, the punchline is the cost, not how long it took, although that was appalling as well.
From the wikipedia article:
>The toilet's original proposed cost of $1.7 million inspired media coverage and criticism of the San Francisco government.
The whole point is in principle these things are good ideas but in practice they are tools weaponized by NIMBYs. This is the fig leaf that keeps them around. "But why would you do away with environmental review???" As if you were to stab 55 gal drums of toxic waste and dump them into a river. But really you were trying to build an apartment as large as many other existing apartments in the middle of the city. Or in this case, install something on the sidewalk.
From the wikipedia article:
>The toilet's original proposed cost of $1.7 million inspired media coverage and criticism of the San Francisco government.