Tdd is actual engineering: requirements first, set expectations, plan, estimate, build. Silicon Valley (generalization) has extreme shortsghtedness when it comes to building software, there are a lot of prima donnas, hipsters using whatever is cool,tech decisions made on opinion rather than measurement, and NIH.
Have a spine and push for tdd. The prima donnas will attack you ad hominum and call you slow. But it feels pretty damned good to be right.