Try not to dismiss ideas so quickly as "virtue signalling" without an understanding of what they accomplish
Cars vs. transit is a pure throughput issue. You will never, even with 14 lane highways, beat one grade separated transit line with how many people you can move per hour. Eventually you run out of land with roads and cars, with trains you effectively do not.
- Short, local travel where large scale transport services don’t make sense, and
- As a mediocre stop gap measure to make up for lacking infrastructure.
The idea that busses go on the highway in Seattle is appalling
Agree that you can move many more people on one set of rails than one highway, but it's not unlimited.
But our ruthlessly individual mindset here in the states blocks us from reaching many of these higher level goals.
1. We do not have the political power to ban the cars to clear the traffic until people already ride transit.
2. People will not ride in sufficient numbers unless it dodges traffic.
So yes, there is nothing materially wrong with surface-level transit, but we can't make that work until the cars are already gone...so we are stuck building more tunnels, viaducts, etc.
Light rail right like this fundamental is a salve, or yet another feel-good government service for the poor. But it doesn't help us change mass culture, nor can it easily be reformed into something that does.
Now, I should concede Pre-metro / Stadtbahn is not dead end, and allows for an incrementalist approach that is not just slapping band-aids. But you still need to put the urban core underground to have a beachhead, and to my knowledge only San Francisco of North American cities has a light rail that does that.
1. Do not know how other countries work. A lot of stuff seems far fetched until you learn about about the places where it already happens.
2. Don't know much history so essentialize the last 50 years as the way it always ways (similar to 1)
3. Believe in "monotonically of virtue": i.e. that various compromises and half-measures at least deliver half the value.
4. Lack a sense of a urgency, or have faith that "at the end of the day, American institutions are good will work it out".
5. Might be more "idealist than materialist".
Of the 3 stops where it isn't, it has it's own lane on a major thoroughfare and only chances an errant driver crossing an intersection.
Now for the Seattle Streetcars, those are a different story. For the most part, they have a dedicated lane so they breeze past traffic, but could get caught if traffic is especially bad.
Your description is apt for the South Lake Union Streetcar, though.
Within the densest part of Seattle they took over the underground tunnels which for years had been used as (electric) bus transit only tunnels with light rail.
Past the stadium in the south it's at grade.
After a brief tunnel under the major hill it is at grade through the gentrifying area south of Seattle.
It goes above grade near the airport.
There are expansions to the east and north that I haven't seen yet, and the expansion to the south hasn't yet reached a stage where I've seen sufficient details to answer.
It's grade separated pretty much all the way north to Northgate and beyond. (Which opened this year.) Northgate, Roosevelt, U District, UW, capitol Hill, all the downtown stops are all separated in tunnels/elevated rail.
It's at grade only in parts of SODO and South Seattle. The bulk is separated. Even when not, it takes priority at crossings and has it's own lanes that are rarely shared with cars.
Progressives building trains that sit in traffic is very expensive virtue signalling as far as I am concerned.