Well, it's Bloomberg so I assume it's because rich people don't use it and can't be arsed to realize that it allows the poors to travel to work. And if they did think about it, they'd just expect the moochers riding transit to buy cars with their fancy coffee and avocado toast budgets.

Because the wealthy fucks that take Bloomberg seriously are delusional, out of touch wankers.

Since it's rivalrous (no one can sit in your seat while you're in it) and excludable (they can exclude non payers if they choose).

That means it doesn't not meet the criteria of a public good.