I don’t doubt their brilliance. However, I have found in my career that a lot of brilliant people have an unfortunate habit of making things more difficult than they have to be. I think Angular is a case in point. It has a steep learning curve and lots of leaky abstractions (Zone, AOT, *ngSyntax, IE polyfills, change detection, huge API surface area…).
Vue & React are easier to learn for beginners, and yet they’re scalable to enterprise-level.