My gut tells me it’s definitely an economic factor. I think it’s because the netherlands has towns that are close together, so burying 1 km of electrical cable could potentially serve more people. In texas, possibly, a km of electrical cable will go from the road to someone’s house
It’s in the numbers too. The netherlands, as a whole, has a population density of 424/km2. Texas has about 1/10th that, at 42.9/km2.