No, I agree, we should do mass transit. I want more of it. I use what's already there when it makes sense. I'd love to massively reduce my VMT.
But take for example my neighborbood. There's bus lines on the north edge going east-west, bus lines on the west edge going north-south. I'm lucky, I live at the west edge of my neighborhood near one of the entrances so the north line stop is just outside my door. The south bound stop is across six lanes of 40+mph traffic with the nearest crosswalk over a quarter mile. It's a half-mile walk from my house to the east-west stop on the north edge of my neighborhood. And I'm in the middle-west edge of my neighborhood, if you're in the south-east of the neighborhood you've got about a mile walk to get to a bus stop. And my neighborhood isn't even a very big one for DFW.
It doesn't make sense to snake the busses all throughout the neighborhoods, you'll spend all the bus travel time going up and down residential streets. Nobody wants to ride on a bus slowly crawling through the maze of residences.
And even then, once I get on the bus half the travel time is just going past one development of houses after another. And I'm in a generally denser and more mixed part of the city than a lot of these places. Lots of my friends live in neighborhoods where it's at least a 5-10min drive to leave their neighborhood. Then they pass by a few neighborhoods before they get to the first small smatterings of retail, but chances are it doesn't have the stop they're interested in.
Transit really just can't function with this design. We need to redesign this to make it work. Cut up these massive residential only blocks, mix in some retail, densify things, etc. I'm not saying this to suggest we can't do it, I'm just being realistic to the challenges at hand. Burying your head in the sand acting like it's just a matter of another train line or more bus service or adding bike lanes isn't going to solve the systemic design issues we have in a lot of US cities and towns.