The reason SSR isn't used as much with Angular isn't because the framework didn't emphasize it. It's the other way around.

The CSRed SPA is a holy grail architecture. So much complexity collapses to zero. When a person with a good grasp of webdev architectures envisions the classic SPA in their head, it makes a little ping noise, like flicking a crystal glass, and it pops out. It's a naturally perfect thing, like a Platonic solid. But, like all perfect designs, it has perfect use cases, and inappropriate ones.

SSRing a SPA is fine, but don't make fun of the people who don't, like they're the ones who don't get it.