Unreinforced masonry, like a church, are extremely inefficient in terms of material and labor, think 6 foot deep walls that taper up to carry load. Optimally, bricks work in conjunction with reinforced concrete skeleton for modern construction. Cost is also a big factor, especially in developed countries, more so for high quality finishes. There's a case for small brick constructions in less developed countries with high unemployment and low wages.

In terms of embodied energy, brick veneer (composite of materials with a layer of exterior brick) typically have the best life-cycle ecological performance, 20%-60% better, compared to curtain wall (glass+steel) and precast concrete panels, across many climates and regions. Engineered wood for buildings is probably the better option in the long run. There's a lot of movement recently, construction is a very slow and conservative industry though. Probably need for results to be validated. A lot of claims are by industry publications. But intuitively it feels right.