Dallas has the largest light rail system in the country and it's total shit.
A thirty minute car trip takes two hours by public transit if everything goes smoothly. Minus the walking. You could get on a highway clogged with a flaming semi truck accident across four lanes and it will clear up faster than you could make the distance on public transit. This is not hyperbole, I have literally done this.
Buses don't run on time, they run early because the drivers run the route as fast as possible and so they can kill time parked at a stop. You will be late if you show up on time. Trains are twenty minutes apart on a good day, if you can even make it to the station. Living next to the station would be optimal but all the apartments they build there have parking lots full of luxury SUVs and you know those bougie fuckers don't ride the train.
If you ride a bike you will just die.