That's absurd. Waymo exacerbates the problem. It doesn't provide public transport.
You get unlimited travel for $100/month on Trimet. You think Waymo is going to cost anything close to that?
Only because the government is subsidizing 90% of TriMet's operating costs.
It might be interesting to see what sort of system Waymo could build with a similar subsidy... but that's never going to happen.
That's like owning a train system and not paying for the tracks. Yeah... that's a huge part of it.
There's also indirect subsidies, for example the cost of land and housing. Cars are extremely space inefficient, so they encourage poor urban design that results in huge amounts of land wasted.
Well... the land and property that's left is then inflated in price. You could consider that cost difference as a subsidy to all drivers.
Everyone uses roads, and everyone pays for roads. If you buy a potato from a grocery store, part of the money paid for fuel for the delivery truck. The tax on that fuel paid for part of the road.